Umar (may Allah be pleased with him) took a vow in the pre-Islamic days to spend a night or a day in devotion near the Ka'bah (in the sacred mosque). He asked the Prophet (saws) about it. He said: Observe i'tikaf (i.e. spend a night or a day near the Ka'bah) and fast.

Allah's Apostle wrote to Caesar and invited him to Islam and sent him his letter with Dihya Al-Kalbi whom Allah's Apostle ordered to hand it over to the Governor of Busra who would forward it to Caesar. Caesar as a sign of gratitude to Allah, had walked from Hims to Ilya (i.e. Jerusalem) when Allah had granted Him victory over the Persian forces. So, when the letter of Allah's Apostle reached Caesar, he said after reading it, 'Seek for me any one of his people! (Arabs of Quraish tribe) if present here, in order to ask him about Allah's Apostle. At that time Abu Sufyan bin Harb was in Sham with some men from Quraish who had come (to Sham) as merchants during the truce that had been concluded between Allah's Apostle; and the infidels of Quraish. Abu Sufyan said, Caesar's messenger found us somewhere in Sham so he took me and my companions to Ilya and we were admitted into Ceasar's court to find him sitting in his royal court wearing a crown and surrounded by the senior dignitaries of the Byzantine. He said to his translator. 'Ask them who amongst them is a close relation to the man who claims to be a prophet." Abu Sufyan added, "I replied, 'I am the nearest relative to him.' He asked, 'What degree of relationship do you have with him?' I replied, 'He is my cousin,' and there was none of Bani Abu Manaf in the caravan except myself. Caesar said, 'Let him come nearer.' He then ordered that my companions stand behind me near my shoulder and said to his translator, 'Tell his companions that I am going to ask this man about the man who claims to be a prophet. If he tells a lie, they should contradict him immediately." Abu Sufyan added, "By Allah! Had it not been shameful that my companions label me a liar, I would not have spoken the truth about him when he asked me. But I considered it shameful to be called a liar by my companions. So I told the truth. He then said to his translator, 'Ask him what kind of family does he belong to.' I replied, 'He belongs to a noble family amongst us.' He said, 'Have anybody else amongst you ever claimed the same before him? 'I replied, 'No.' He said, 'Had you ever blamed him for telling lies before he claimed what he claimed? ' I replied, 'No.' He said, 'Was anybody amongst his ancestors a king?' I replied, 'No.' He said, "Do the noble or the poor follow him?' I replied, 'It is the poor who follow him.' He said, 'Are they increasing or decreasing (day by day)?' I replied,' They are increasing.' He said, 'Does anybody amongst those who embrace his (the Prophet's) Religion become displeased and then discard his Religion?'. I replied, 'No. ' He said, 'Does he break his promises? I replied, 'No, but we are now at truce with him and we are afraid that he may betray us." Abu Sufyan added, "Other than the last sentence, I could not say anything against him. Caesar then asked, 'Have you ever had a war with him?' I replied, 'Yes.' He said, 'What was the outcome of your battles with him?' I replied, 'The result was unstable; sometimes he was victorious and sometimes we.' He said, 'What does he order you to do?' I said, 'He tells us to worship Allah alone, and not to worship others along with Him, and to leave all that our fore-fathers used to worship. He orders us to pray, give in charity, be chaste, keep promises and return what is entrusted to us.' When I had said that, Caesar said to his translator, 'Say to him: I ask you about his lineage and your reply was that he belonged to a noble family. In fact, all the apostles came from the noblest lineage of their nations. Then I questioned you whether anybody else amongst you had claimed such a thing, and your reply was in the negative. If the answer had been in the affirmative, I would have thought that this man was following a claim that had been said before him. When I asked you whether he was ever blamed for telling lies, your reply was in the negative, so I took it for granted that a person who did not tell a lie about (others) the people could never tell a lie about Allah. Then I asked you whether any of his ancestors was a king. Your reply was in the negative, and if it had been in the affirmative, I would have thought that this man wanted to take back his ancestral kingdom. When I asked you whether the rich or the poor people followed him, you replied that it was the poor who followed him. In fact, such are the followers of the apostles. Then I asked you whether his followers were increasing or decreasing. You replied that they were increasing. In fact, this is the result of true faith till it is complete (in all respects). I asked you whether there was anybody who, after embracing his religion, became displeased and discarded his religion; your reply was in the negative. In fact, this is the sign of true faith, for when its cheerfulness enters and mixes in the hearts completely, nobody will be displeased with it. I asked you whether he had ever broken his promise. You replied in the negative. And such are the apostles; they never break their promises. When I asked you whether you fought with him and he fought with you, you replied that he did, and that sometimes he was victorious and sometimes you. Indeed, such are the apostles; they are put to trials and the final victory is always theirs. Then I asked you what he ordered you. You replied that he ordered you to worship Allah alone and not to worship others along with Him, to leave all that your fore-fathers used to worship, to offer prayers, to speak the truth, to be chaste, to keep promises, and to return what is entrusted to you. These are really the qualities of a prophet who, I knew (from the previous Scriptures) would appear, but I did not know that he would be from amongst you. If what you say should be true, he will very soon occupy the earth under my feet, and if I knew that I would reach him definitely, I would go immediately to meet Him; and were I with him, then I would certainly wash his feet.' " Abu Sufyan added, "Caesar then asked for the letter of Allah's Apostle and it was read. Its contents were: "In the name of Allah, the most Beneficent, the most Merciful (This letter is) from Muhammad, the slave of Allah, and His Apostle, to Heraculius, the Ruler of the Byzantine. Peace be upon the followers of guidance. Now then, I invite you to Islam (i.e. surrender to Allah), embrace Islam and you will be safe; embrace Islam and Allah will bestow on you a double reward. But if you reject this invitation of Islam, you shall be responsible for misguiding the tillers (i.e. your nation). O people of the Scriptures! Come to a word common to you and us and you, that we worship. None but Allah, and that we associate nothing in worship with Him; and that none of us shall take others as Lords besides Allah. Then if they turn away, say: Bear witness that we are (they who have surrendered (unto Him)..(3.64) Abu Sufyan added, "When Heraclius had finished his speech, there was a great hue and cry caused by the Byzantine Royalties surrounding him, and there was so much noise that I did not understand what they said. So, we were turned out of the court. When I went out with my companions and we were alone, I said to them, 'Verily, Ibn Abi Kabsha's (i.e. the Prophet's) affair has gained power. This is the King of Bani Al-Asfar fearing him." Abu Sufyan added, "By Allah, I remained low and was sure that his religion would be victorious till Allah converted me to Islam, though I disliked it."

Who, from among Ka`b's sons, was the guide of Ka`b when he became blind: I heard Ka`b bin Malik narrating the story of (the Ghazwa of) Tabuk in which he failed to take part. Ka`b said, "I did not remain behind Allah's Apostle in any Ghazwa that he fought except the Ghazwa of Tabuk, and I failed to take part in the Ghazwa of Badr, but Allah did not admonish anyone who had not participated in it, for in fact, Allah's Apostle had gone out in search of the caravan of Quraish till Allah made them (i.e. the Muslims) and their enemy meet without any appointment. I witnessed the night of Al-`Aqaba (pledge) with Allah's Apostle when we pledged for Islam, and I would not exchange it for the Badr battle although the Badr battle is more popular amongst the people than it (i.e. Al-`Aqaba pledge). As for my news (in this battle of Tabuk), I had never been stronger or wealthier than I was when I remained behind the Prophet in that Ghazwa. By Allah, never had I two she-camels before, but I had then at the time of this Ghazwa. Whenever Allah's Apostle wanted to make a Ghazwa, he used to hide his intention by apparently referring to different Ghazwa till it was the time of that Ghazwa (of Tabuk) which Allah's Apostle fought in severe heat, facing, a long journey, desert, and the great number of enemy. So the Prophet announced to the Muslims clearly (their destination) so that they might get prepared for their Ghazwa. So he informed them clearly of the destination he was going to. Allah's Apostle was accompanied by a large number of Muslims who could not be listed in a book namely, a register." Ka`b added, "Any man who intended to be absent would think that the matter would remain hidden unless Allah revealed it through Divine Revelation. So Allah's Apostle fought that Ghazwa at the time when the fruits had ripened and the shade looked pleasant. Allah's Apostle and his companions prepared for the battle and I started to go out in order to get myself ready along with them, but I returned without doing anything. I would say to myself, 'I can do that.' So I kept on delaying it every now and then till the people got ready and Allah's Apostle and the Muslims along with him departed, and I had not prepared anything for my departure, and I said, I will prepare myself (for departure) one or two days after him, and then join them.' In the morning following their departure, I went out to get myself ready but returned having done nothing. Then again in the next morning, I went out to get ready but returned without doing anything. Such was the case with me till they hurried away and the battle was missed (by me). Even then I intended to depart to take them over. I wish I had done so! But it was not in my luck. So, after the departure of Allah's Apostle, whenever I went out and walked amongst the people (i.e, the remaining persons), it grieved me that I could see none around me, but one accused of hypocrisy or one of those weak men whom Allah had excused. Allah's Apostle did not remember me till he reached Tabuk. So while he was sitting amongst the people in Tabuk, he said, 'What did Ka`b do?' A man from Banu Salama said, 'O Allah's Apostle! He has been stopped by his two Burdas (i.e. garments) and his looking at his own flanks with pride.' Then Mu`adh bin Jabal said, 'What a bad thing you have said! By Allah! O Allahs Apostle! We know nothing about him but good.' Allah's Apostle kept silent." Ka`b bin Malik added, "When I heard that he (i.e. the Prophet ) was on his way back to Medina. I got dipped in my concern, and began to think of false excuses, saying to myself, 'How can I avoid his anger tomorrow?' And I took the advice of wise member of my family in this matter. When it was said that Allah's Apostle, had come near all the evil false excuses abandoned from my mind and I knew well that I could never come out of this problem by forging a false statement. Then I decided firmly to speak the truth. So Allah's Apostle arrived in the morning, and whenever he returned from a journey., he used to visit the Mosque first of all and offer a two-rak`at prayer therein and then sit for the people. So when he had done all that (this time), those who had failed to join the battle (of Tabuk) came and started offering (false) excuses and taking oaths before him. They were something over eighty men; Allah's Apostle accepted the excuses they had expressed, took their pledge of allegiance asked for Allah's Forgiveness for them, and left the secrets of their hearts for Allah to judge. Then I came to him, and when I greeted him, he smiled a smile of an angry person and then said, 'Come on.' So I came walking till I sat before him. He said to me, 'What stopped you from joining us. Had you not purchased an animal For carrying you?' I answered, "Yes, O Allah's Apostle! But by Allah, if I were sitting before any person from among the people of the world other than you, I would have avoided his anger with an excuse. By Allah, I have been bestowed with the power of speaking fluently and eloquently, but by Allah, I knew well that if today I tell you a lie to seek your favor, Allah would surely make you angry with me in the near future, but if I tell you the truth, though you will get angry because of it, I hope for Allah's Forgiveness. Really, by Allah, there was no excuse for me. By Allah, I had never been stronger or wealthier than I was when I remained behind you.' Then Allah's Apostle said, 'As regards this man, he has surely told the truth. So get up till Allah decides your case.' I got up, and many men of Banu Salama followed me and said to me. 'By Allah, we never witnessed you doing any sin before this. Surely, you failed to offer excuse to Allah's Apostle as the others who did not join him, have offered. The prayer of Allah's Apostle to Allah to forgive you would have been sufficient for you.' By Allah, they continued blaming me so much that I intended to return (to the Prophet) and accuse myself of having told a lie, but I said to them, 'Is there anybody else who has met the same fate as I have?' They replied, 'Yes, there are two men who have said the same thing as you have, and to both of them was given the same order as given to you.' I said, 'Who are they?' They replied, Murara bin Ar-Rabi Al- Amri and Hilal bin Umaiya Al-Waqifi.' By that they mentioned to me two pious men who had attended the Ghazwa (Battle) of Badr, and in whom there was an example for me. So I did not change my mind when they mentioned them to me. Allah's Apostle forbade all the Muslims to talk to us, the three aforesaid persons out of all those who had remained behind in that Ghazwa. So we kept away from the people and they changed their attitude towards us till the very land (where I lived) appeared strange to me as if I did not know it. We remained in that condition for fifty nights. As regards my two fellows, they remained in their houses and kept on weeping, but I was the youngest of them and the firmest of them, so I used to go out and witness the prayers along with the Muslims and roam about in the markets, but none would talk to me, and I would come to Allah's Apostle and greet him while he was sitting In his gathering after the prayer, and I would wonder whether the Prophet did move his lips in return to my greetings or not. Then I would offer my prayer near to him and look at him stealthily. When I was busy with my prayer, he would turn his face towards me, but when I turned my face to him, he would turn his face away from me. When this harsh attitude of the people lasted long, I walked till I scaled the wall of the garden of Abu Qatada who was my cousin and dearest person to me, and I offered my greetings to him. By Allah, he did not return my greetings. I said, 'O Abu Qatada! I beseech you by Allah! Do you know that I love Allah and His Apostle?' He kept quiet. I asked him again, beseeching him by Allah, but he remained silent. Then I asked him again in the Name of Allah. He said, "Allah and His Apostle know it better.' Thereupon my eyes flowed with tears and I returned and jumped over the wall." Ka`b added, "While I was walking in the market of Medina, suddenly I saw a Nabati (i.e. a Christian farmer) from the Nabatis of Sham who came to sell his grains in Medina, saying, 'Who will lead me to Ka`b bin Malik?' The people began to point (me) out for him till he came to me and handed me a letter from the king of Ghassan in which the following was written: "To proceed, I have been informed that your friend (i.e. the Prophet ) has treated you harshly. Anyhow, Allah does not let you live at a place where you feel inferior and your right is lost. So join us, and we will console you." When I read it, I said to myself, 'This is also a sort of a test.' Then I took the letter to the oven and made a fire therein by burning it. When forty out of the fifty nights elapsed, behold ! There came to me the messenger of Allah's Apostle and said, 'Allah's Apostle orders you to keep away from your wife,' I said, 'Should I divorce her; or else! what should I do?' He said, 'No, only keep aloof from her and do not cohabit her.' The Prophet sent the same message to my two fellows. Then I said to my wife. 'Go to your parents and remain with them till Allah gives His Verdict in this matter." Ka`b added, "The wife of Hilal bin Umaiya came to Apostle and said, 'O Allah's Apostle! Hilal bin Umaiya is a helpless old man who has no servant to attend on him. Do you dislike that I should serve him? ' He said, 'No (you can serve him) but he should not come near you.' She said, 'By Allah, he has no desire for anything. By, Allah, he has never ceased weeping till his case began till this day of his.' (continued...) (continuing... 1): -5.702:... ... On that, some of my family members said to me, 'Will you also ask Allah's Apostle to permit your wife (to serve you) as he has permitted the wife of Hilal bin Umaiya to serve him?' I said, 'By Allah, I will not ask the permission of Allah's Apostle regarding her, for I do not know What Allah's Apostle would say if I asked him to permit her (to serve me) while I am a young man.' Then I remained in that state for ten more nights after that till the period of fifty nights was completed starting from the time when Allah's Apostle prohibited the people from talking to us. When I had offered the Fajr prayer on the 50th morning on the roof of one of our houses and while I was sitting in the condition which Allah described (in the Qur'an) i.e. my very soul seemed straitened to me and even the earth seemed narrow to me for all its spaciousness, there I heard the voice of one who had ascended the mountain of Sala' calling with his loudest voice, 'O Ka`b bin Malik! Be happy (by receiving good tidings).' I fell down in prostration before Allah, realizing that relief has come. Allah's Apostle had announced the acceptance of our repentance by Allah when he had offered the Fajr prayer. The people then went out to congratulate us. Some bringers of good tidings went out to my two fellows, and a horseman came to me in haste, and a man of Banu Aslam came running and ascended the mountain and his voice was swifter than the horse. When he (i.e. the man) whose voice I had heard, came to me conveying the good tidings, I took off my garments and dressed him with them; and by Allah, I owned no other garments than them on that day. Then I borrowed two garments and wore them and went to Allah's Apostle. The people started receiving me in batches, congratulating me on Allah's Acceptance of my repentance, saying, 'We congratulate you on Allah's Acceptance of your repentance." Ka`b further said, "When I entered the Mosque. I saw Allah's Apostle sitting with the people around him. Talha bin Ubaidullah swiftly came to me, shook hands with me and congratulated me. By Allah, none of the Muhajirin (i.e. Emigrants) got up for me except him (i.e. Talha), and I will never forget this for Talha." Ka`b added, "When I greeted Allah's Apostle he, his face being bright with joy, said "Be happy with the best day that you have got ever since your mother delivered you." Ka`b added, "I said to the Prophet 'Is this forgiveness from you or from Allah?' He said, 'No, it is from Allah.' Whenever Allah's Apostle became happy, his face would shine as if it were a piece of moon, and we all knew that characteristic of him. When I sat before him, I said, 'O Allah's Apostle! Because of the acceptance of my repentance I will give up all my wealth as alms for the Sake of Allah and His Apostle. Allah's Apostle said, 'Keep some of your wealth, as it will be better for you.' I said, 'So I will keep my share from Khaibar with me,' and added, 'O Allah's Apostle! Allah has saved me for telling the truth; so it is a part of my repentance not to tell but the truth as long as I am alive. By Allah, I do not know anyone of the Muslims whom Allah has helped fortelling the truth more than me. Since I have mentioned that truth to Allah's Apostle till today, I have never intended to tell a lie. I hope that Allah will also save me (from telling lies) the rest of my life. So Allah revealed to His Apostle the Verse:-- "Verily, Allah has forgiven the Prophet, the Muhajirin (i.e. Emigrants (up to His Saying) And be with those who are true (in word and deed)." (9.117-119) By Allah, Allah has never bestowed upon me, apart from His guiding me to Islam, a Greater blessing than the fact that I did not tell a lie to Allah's Apostle which would have caused me to perish as those who have told a lie perished, for Allah described those who told lies with the worst description He ever attributed to anybody else. Allah said:-- "They (i.e. the hypocrites) will swear by Allah to you when you return to them (up to His Saying) Certainly Allah is not pleased with the rebellious people-- " (9.95-96) Ka`b added, "We, the three persons, differed altogether from those whose excuses Allah's Apostle accepted when they swore to him. He took their pledge of allegiance and asked Allah to forgive them, but Allah's Apostle left our case pending till Allah gave His Judgment about it. As for that Allah said):-- And to the three (He did for give also) who remained behind." (9.118) What Allah said (in this Verse) does not indicate our failure to take part in the Ghazwa, but it refers to the deferment of making a decision by the Prophet about our case in contrast to the case of those who had taken an oath before him and he excused them by accepting their excuses.

The Prophet (saws) said: We forbade you to eat their meat for more than three days in order that you might have abundance; now Allah has produced abundance, so you may eat, store up and seek reward. Beware, these days are days of eating, drinking and remembrance of Allah, Most High.

Ibn `Abbas mentioned the case of a couple on whom the judgment of Lian has been passed. `Abdullah bin Shaddad said, "Was that the lady in whose case the Prophet said, "If I were to stone a lady to death without a proof (against her)?' "Ibn `Abbas said, "No! That was concerned with a woman who though being a Muslim used to arouse suspicion by her outright misbehavior." (See Hadith No. 230, Vol.7)

Should I tell you what I heard the Messenger of Allah (saws) say on the day of Hunayn: It is not lawful for a man who believes in Allah and the last day to water what another has sown with his water (meaning intercourse with women who are pregnant); it is not lawful for a man who believes in Allah and the Last Day to have intercourse with a captive woman till she is free from a menstrual course; and it is not lawful for a man who believes in Allah and the Last Day to sell spoil till it is divided.

A man came to the Prophet (saws) and said: How do you fast, Messenger of Allah? The Messenger of Allah (saws) became angry at what he said.

When Umar observed this (his anger), he said: We are satisfied with Allah as Lord, with Islam as religion, and with Muhammad as Prophet. We seek refuge in Allah from the anger of Allah, and from the anger of His Apostle. Umar continued to repeat these words till his anger cooled down. He then asked: Messenger of Allah, what is the position of one who observes a perpetual fast?

He replied: May he not fast or break his fast. Musaddad said in his version: He has neither fasted nor broken his fast. The narrator, Ghaylan, doubted the actual wordings.

He asked: What is the position of one who fasts two days and does not fast one day?

He said: Is anyone able to do that? He asked: What is the position of one who fasts every second day (i.e. fasts one day and does not fasts the next day)?

He (the Prophet) said: This is the fast that David observed.

He asked: Messenger of Allah, what is the position of one who fasts one day and breaks it for two days? He replied: I wish I were given the power to observe that. Then the Messenger of Allah (saws) said: The observance of three days' fast every month and of one Ramadan to the other (i.e. the fast of Ramadan every year) is (equivalent to) a perpetual fast. I seek from Allah that fasting on the day of Arafah may atone for the sins of the preceding and the coming year, and I seek from Allah that fasting on the day of Ashura' may atone for the sins of the preceding year.

Another chain reports a similar hadith.

We kept fast for twenty-nine days along with the Prophet (saws) more often than we kept fast for thirty days.

Yahya related to me from Malik from Hisham ibn Urwa from his father that the Messenger of Allah, may Allah bless him and grant him peace, prayed four raka prayers with only two rakas when at Mina, and that Abu Bakr prayed them at Mina with only two rakas, and that Umar ibn al-Khattab prayed them at Mina with only two rakas, and that Uthman prayed them at Mina with only two rakas for half of his khalifate, and then later completed them.

From Jarir bin 'Abdullah that the Messenger of Allah (saws) sent a military expedition to Khath'am. So some people (living there) sought safety by prostrating, but they were met quickly and killed. News of this reached the Prophet (saws) upon which he commanded that they be given half of the 'Aql (blood money). And he said: "I am free from every Muslim that lives among the idolaters." They said:"O Messenger of Allah: How is that ?" He said: "They should not see each other's campfires."

The Prophet (saws) said: The greatest day in Allah's sight is the day of sacrifice and next the day of resting which Isa said on the authority of Thawr is the second day. Five or six sacrificial camels were brought to the Messenger of Allah (saws) and they began to draw near to see which he would sacrifice first. When they fell down dead, he said something in a low voice, which I could not catch. So I asked: What did he say? He was told that he had said: Anyone who wants can cut off a piece.

The Prophet (saws) as saying to him: Complete the recitation of the Qu'ran in one month. He said: I have more strength. He (the Prophet) said: Complete the recitation in twenty days. He again said: I have more energy. He said : Recite in fifteen days. He again said: I have more energy. He said: Recite in ten days. He again said: I have more energy. He said: Recite in seven days, do not add to it.

Abu Dawud said: The tradition narrated by Muslim is more perfect.

The Messenger of Allah (saws) concluded peace with the people of Najran on condition that they would pay to Muslims two thousand suits of garments, half of Safar, and the rest in Rajab, and they would lend (Muslims) thirty coats of mail, thirty horses, thirty camels, and thirty weapons of each type used in battle. Muslims will stand surely for them until they return them in case there is any plot or treachery in the Yemen. No church of theirs will be demolished and no clergyman of theirs will be turned out. There will be no interruption in their religion until they bring something new or take usury. Isma'il said: They took usury.

Abu Dawud said: If they violate any provision of the treaty, they will be deemed as bringing something new.

The Messenger of Allah (saws) offered the noon prayer on the 8th of Dhul-Hijjah (Yawm at-Tarwiyah) and dawn prayer on the 9th of Dhul-Hijjah (Yawm al-Arafah) in Mina.

On the authority of his father: The Messenger of Allah (saws) permitted the herdsmen of the camel to lapidate the the jamrahs one day and omit one day.

The Prophet (saws) said: The month consists of twenty-nine days, but do not fast till you sight it (the moon) and do not break your fast till you sight it. If the weather is cloudy, calculate it thirty days. When the twenty-ninth of Sha'ban came, Ibn Umar would send someone (who tried) to sight the moon for him. If it was sighted, then well and good; in case it was not sighted, and there was no cloud and dust before him (on the horizon), he would not keep fast the next day. If there appeared (on the horizon) before him cloud or dust, he would fast the following day. Ibn Umar would end his fasting alone with the people, and did not follow this calculation.

The Prophet (saws) said: Do not fast (for Ramadan) before the coming of the month until you sight the moon or complete the number (of thirty days); then fast until you sight the moon or complete the number (of thirty days).