The Messenger of Allah (saw) used to spend the last ten days of Ramadan in I’tikaf.

Nafi' said: " Abdullah bin 'Umar showed me the place where the Messenger of Allah (SAW) used to observe I'tikaf."

I went out one night to the mosque with ‘Umar b. al-Khattab and we saw the people in sections separate from one another, one man praying by himself, and another followed by a group; so ‘Umar said, “If I collected these people behind one reciter it would be better." He then made up his mind and collected them with Ubayy b. Ka‘b as imam. Afterwards I went out with him another night when the people were following the prayer of their reciter, and ‘Umar said, “This is a good innovation, but what you miss through sleeping is more excellent than what you are getting up for, meaning at the end of the night, for the people were getting up during the early part of the night. Bukhari transmitted it.

The Messenger of Allah (PBUH) said, "The best month for observing Saum (fasting) after Ramadan is Muharram, and the best Salat after the prescribed Salat is Salat at night."

[Muslim].

Abu Huraira reported God’s messenger as saying, “The most excellent fast after Ramadan is in God’s month al-Muharram, and the most excellent prayer after what is prescribed is prayer during the night." Muslim transmitted it.

The Prophet (PBUH) used to observe I'tikaf every year (during Ramadan) for ten days; in the year in which he passed away, he observed I'tikaf for twenty days.

[Al-Bukhari].

Yahya related to me from Malik from Humayd at-Tawil that Anas ibn Malik said, "We once travelled with the Messenger of Allah, may Allah bless him and grant him peace, in Ramadan, and those who were fasting did not find fault with those who were not, and those who were not fasting did not find fault with those who were."

(A man broke his fast intentionally) during Ramadan. The Messenger of Allah (saws) commanded him to emancipate a slave, or fast for two months, or feed sixty poor men. He said: I cannot provide. The Messenger of Allah (saws) said: Sit down. Thereafter a huge basket of dates ('araq) was brought to the Messenger of Allah (saws). He said: Take this and give it as sadaqah (alms). He said: Messenger of Allah, there is no poorer than I. The Messenger of Allah (saws) thereupon laughed so that his canine teeth became visible and said: Eat it yourself.

Abu Dawud said: Ibn Juraij narrated it from al-Zuhri in the wordings of the narrator Malik that a man broke his fast. This version says: You should either free a slave, or fast for two months, or provide food for sixty poor men.

We fasted with the Messenger of Allah (saws) during Ramadan, but he did not make us get up at night for prayer at any time during the month till seven nights remained; then he made us get up for prayer till a third of the night had passed. When the sixth remaining night came, he did not make us get up for prayer. When the fifth remaining night came, he made us stand in prayer till a half of the night had gone.

So I said: Messenger of Allah, I wish you had led us in supererogatory prayers during the whole of tonight.

He said: When a man prays with an imam till he goes he is reckoned as having spent a whole night in prayer. On the fourth remaining night he did not make us get up. When the third remaining night came, he gathered his family, his wives, and the people and prayed with us till we were afraid we should miss the falah (success).

I said: What is falah? He said: The meal before daybreak. Then he did not make us get up for prayer during the remainder of the month.

"I did not see the Prophet fasting two consecutive months except for Sha'ban and Ramadan."

Malik related to me from Ibn Shihab from Urwa ibn az-Zubayr that Abd ar-Rahman ibn Abd al-Qari said, "I went out with Umar ibn alKhattab in Ramadan to the mosque and the people there were spread out in groups. Some men were praying by themselves, whilst others were praying in small groups. Umar said, 'By Allah! It would be better in my opinion if these people gathered behind one reciter.' So he gathered them behind Ubayy ibn Kab. Then I went out with him another night and the people were praying behind their Qur'an reciter. Umar said, 'How excellent this new way is, but what you miss while you are asleep is better than what you watch in prayer.' He meant the end of the night, and people used to watch the beginning of the night in prayer."

"I was a man who had a lot of desire for women, and I do not think there was any man who had as great a share of that as me. When Ramadan began, I declared Zihar upon my wife (to last) until Ramadan ended. While she was talking to me one night, part of her body became uncovered. I jumped on her and had intercourse with her. The next morning I went to my people and told them, and said to them: 'Ask the Messenger of Allah (SAW) for me.' They said: 'We will not do that, lest Allah reveal Quran concerning us or the Messenger of Allah (SAW) says, something about us, and it will be a lasting source of disgrace for us. Rather we will leave you to deal with it yourself. Go yourself and tell the Messenger of Allah (SAW) about your problem.' So I went out and when I came to him, I told him what happened. The Messenger of Allah (SAW) said: 'Did you really do that?' I said: 'I really did that, and here I am, O Messenger of Allah. (SAW) I will bear Allah’s ruling on me with patience.' He said: 'Free a slave.' I said: 'By the One Who sent you with the truth, I do not own anything but myself.' He said: 'Fast for two consecutive months.' I said: 'O Messenger of Allah, the thing that happened to me was only because of fasting.' He said: 'Then give charity, or feed sixty poor persons.' I said: 'By the One Who sent you with the truttu we spent last night with no dinner.' He said: 'Then go to the collector of charity of Banu Zuraiq, and tell him to give you something, then feed sixty poor persons, and benefit from the rest.'"

Abu Hurairah narrated that The Messenger of Allah (P.B.U.H.) said, “Whoever prays during the night in Ramadan out of sincere faith and seeking its reward from Allah, will have all of his previous sins forgiven." Agreed upon.

“I was a man who had an issue with intercourse with a women that none other than me had. When (the month of) Ramadan entered, I pronounced Zihar upon my wife (to last) until the end of Ramadan, fearing that I might have an encounter with her during the night, and I would continue doing that until daylight came upon me, and I would not be able to stop. One night while she was serving me, something of her became exposed for me, so I rushed myself upon her. When the morning came I went to my people to inform them about what happened to me. I said: ‘Accompany me to the Messenger of Allah to inform him about my case.’ They said: ‘No by Allah! We shall not do that, we feat that something will be revealed about us in the Qur’an, or the Messenger of Allah might say something about us, the disgrace of which will remain upon us. But you do and do whatever you want.’” He said: “So I left and I went to the Messenger of Allah, and informed him of my case. He said: ‘You are the one who did that?” I said: ‘I am the one.’ He said: ‘You are the one who did that?” I said: ‘I am the one.’ He said: ‘You are the one who did that?” I said: ‘I am the one, it is before you, so give me Allah’s judgment, for I shall be patient with that.’ He said: ‘Free a slave.’” He said: “I struck the sides of my neck with me hands, and said: ‘No by the One Who sent you with the Truth! I possess nothing besides it.’ He said: ‘Then fast for two months’ I said: ‘O Messenger of Allah! Did this occur to me other than when I was fasting?’ He said: ‘Then feed sixty poor people.’ I said: ‘By the One Who sent you with the Truth! We have spent these nights of ours hungry without an evening meal.’ He said: ‘Go to the one with the charity from Banu Ruzaiq, tell him to give it to you, then feed a Wasq of it, on your behalf, to sixty poor people. Then help yourself and your dependants with the remainder of it.’” He said: “I returned to my people and said: ‘I found dejection and bad ideas with you, and I found liberalness and blessing with the Messenger of Allah. He ordered me to take your charity, so give it to me.’ So they gave it to me.”