Abdullah reported that Allah's Apostle (may peace be upon him) was reclining against a tree in the garden. The rest of the hadith is the same with a slight variation of wording.

While a man was delivering a speech in the tribe of Kinda, he said, "Smoke will prevail on the Day of Resurrection and will deprive the hypocrites their faculties of hearing and seeing. The believers will be afflicted with something like cold only thereof." That news scared us, so I went to (Abdullah) Ibn Mas`ud while he was reclining (and told him the story) whereupon he became angry, sat up and said, "He who knows a thing can say, it, but if he does not know, he should say, 'Allah knows best,' for it is an aspect of knowledge to say, 'I do not know,' if you do not know a certain thing. Allah said to His prophet. 'Say (O Muhammad): No wage do I ask of you for this (Qur'an), nor I am one of the pretenders (a person who pretends things which do not exist.)' (38.86) The Qur'aish delayed in embracing Islam for a period, so the Prophet invoked evil on them, saying, 'O Allah! Help me against them by sending seven years of (famine) like those of Joseph.' So they were afflicted with such a severe year of famine that they were destroyed therein and ate dead animals and bones. They started seeing something like smoke between the sky and the earth (because of severe hunger). Abu Sufyan then came (to the Prophet) and said, "O Muhammad! You came to order us for to keep good relations with Kith and kin, and your kinsmen have now perished, so please invoke Allah (to relieve them).' Then Ibn Mas`ud recited:-- 'Then watch you for the day that the sky will bring forth a kind of smoke plainly visible....but truly you will return! (to disbelief) (44.10-15) Ibn Mas`ud added, Then the punishment was stopped, but truly, they reverted to heathenism (their old way). So Allah (threatened them thus): 'On the day when we shall seize you with a mighty grasp.' (44.16) And that was the day of the Battle of Badr. Allah's saying- "Lizama" (the punishment) refers to the day of Badr Allah's Statement: Alif-Lam-Mim, the Romans have been defeated, and they, after their defeat, will be victorious,' (30.1- 3) (This verse): Indicates that the defeat of Byzantine has already passed.

We came upon `Abdullah bin Mas`ud and he said "O people! If somebody knows something, he can say it, but if he does not know it, he should say, "Allah knows better,' for it is a sign of having knowledge to say about something which one does not know, 'Allah knows better.' Allah said to His Prophet: 'Say (O Muhammad ! ) No wage do I ask of You for this (Qur'an) nor am I one of the pretenders (a person who pretends things which do not exist).' (38.86) Now I will tell you about Ad- Dukhan (the smoke), Allah's Apostle invited the Quraish to embrace Islam, but they delayed their response. So he said, "O Allah! Help me against them by sending on them seven years of famine similar to the seven years of famine of Joseph." So the famine year overtook them and everything was destroyed till they ate dead animals and skins. People started imagining to see smoke between them and the sky because of severe hunger. Allah said: 'Then watch you for the Day that the sky will bring forth a kind of smoke plainly visible, covering the people. . . This is painful torment.' (44.10-11) (So they invoked Allah) "Our Lord! Remove the punishment from us really we are believers." How can there be an (effectual) reminder for them when an Apostle, explaining things clearly, has already come to them? Then they had turned away from him and said: 'One taught (by a human being), a madman?' 'We shall indeed remove punishment for a while, but truly, you will revert (to disbelief).' (44.12-15) Will the punishment be removed on the Day of Resurrection?" `Abdullah added, "The punishment was removed from them for a while but they reverted to disbelief, so Allah destroyed them on the Day of Badr. Allah said: 'The day We shall seize you with a mighty grasp. We will indeed (then) exact retribution." (44.16)

The Messenger of Allah (saws) used to say: "O Allah, I seek refuge in Thee from four things: Knowledge which does not profit, a heart which is not submissive, a soul which has an insatiable appetite, and a supplication which is not heard."

The Prophet said, "The keys of the Unseen are five." And then he recited: 'Verily, the knowledge of the Hour is with Allah (alone).' (31.34)

I heard from Allah's Apostle a narration which none other than I will narrate to you. The Prophet, said, "From among the portents of the our are the following: General ignorance (in religious affairs) will prevail, (religious) knowledge will decrease, illegal sexual intercourse will prevail, alcoholic drinks will be drunk (in abundance), men will decrease and women will increase so much so that for every fifty women there will be one man to look after them."

The Messenger of Allah (saws) came out on 'Id (the festival day). He first offered the prayer and then delivered the sermon . He then went to women, taking Bilal with him. The narrator Ibn Kathir said: The probable opinion of Shu'bah is that he commanded them to give alms. So they began to put (their jewellery).

Allah's Apostle said, "While I was sleeping, I saw myself drinking (i.e. milk), and I was so contented that I saw the milk flowing through my nails. Then I gave (the milk) to `Umar." They (i.e. the companions of the Prophet) asked, "What do you interpret it?" He said, "Knowledge."

That he heard a man reciting a Quranic Verse which he had heard the Prophet reciting in a different way. So he took that man to the Prophet (and told him the story). The Prophet said, "Both of you are reciting in a correct way, so carry on reciting." The Prophet further added, "The nations which were before you were destroyed (by Allah) because they differed."

I heard Allah's Apostle saying, "While I was sleeping, I was given a bowl full of milk (in a dream), and I drank of it to my fill until I noticed its wetness coming out of my nails, and then I gave the rest of it to `Umar." They (the people) asked, "What have you interpreted (about the dream)? O Allah's Apostle?" He said, "(It is Religious) knowledge."

Ziyad related to me from Malik that he had heard a man he trusted of the people of knowledge say, "The Messenger of Allah, may Allah bless him and grant him peace, was shown the lifespans of the people (who had gone) before him, or what Allah willed of that, and it was as if the lives of the people of his community had become too short for them to be able to do as many good actions as others before them had been able to do with their long lives, so Allah gave him Laylat al- Qadr, which is better than a thousand months."

That the Messenger of Allah (saws) judged: "The produce is for the responsible one."

[Abu 'Eisa said:] This Hadith is Hasan Sahih. This Hadith has been reported through routes other than this, and this acted upon according to the people of knowledge.

Allah's Apostle said, "The key of the Unseen are five: Verily with Allah (Alone) is the knowledge of the Hour He sends down the rain and knows what is in the wombs. No soul knows what it will earn tomorrow, and no soul knows in what land it will die. Verily, Allah is All-Knower, All-Aware." (31.34)

The commencement of (the Divine Inspirations to) Allah's Apostle was in the form of true dreams. The Angel came to him and said, "Read! In the Name of your Lord Who has created all exists), has created man from a clot. Read! And your Lord is Most Generous, Who has taught (the writing) by the pen. (96.1-4)

The Prophet said, "The best among you (Muslims) are those who learn the Qur'an and teach it."

I heard Allah's Apostle saying, "While I was sleeping, I saw a bowl full of milk was brought to me and I drank of it (to my fill) till I noticed its wetness flowing (in my body). Then I gave the remaining of it to `Umar." They asked, "O Allah's Apostle! What have you interpreted (about the dream)? He said, "(It is Religious) knowledge." (See Hadith No. 134)

I heard Allah's Apostle saying, "While I was sleeping, I saw that a cup full of milk was brought to me and I drank of it and gave the remaining of it to `Umar bin Al-Khattab." They asked. What have you interpreted (about the dream)? O Allah's Apostle?" The Prophet said. "(It is Religious) knowledge."

Yahya related to me from Malik from Nafi that Abdullah ibn Umar would never wash his head while he was in ihram except if he had to do ghusl because of a wet dream.

Malik said, "I have heard the people of knowledge say that there is no harm in someone who is in ihram rubbing his head with certain kinds of plants after he has stoned the Jamrat al-Aqaba but before he has shaved his head, because once he has finished stoning the Jamrat al-Aqaba it is halal for him to kill lice, to shave his head, to clean himself of body hair, and to wear normal clothes."

When Abu Bakr As-Siddiq was chosen Caliph, he said, "My people know that my profession was not incapable of providing substance to my family. And as I will be busy serving the Muslim nation, my family will eat from the National Treasury of Muslims, and I will practice the profession of serving the Muslims."

[Abu 'Eisa said:] There are narrations on this topic from Ibn 'Umar and Abu Hurairah. This Hadith is Hasan Sahih, and this is acted upon according to the people of knowledge.