Sahih al-Bukhari Book 65, Hadith 332
Some pagans who committed murders in great number and committed illegal sexual intercourse
excessively, came to Muhammad and said, "O Muhammad! Whatever you say and invite people to, is
good: but we wish if you could inform us whether we can make an expiration for our (past evil)
deeds." So the Divine Verses came: 'Those who invoke not with Allah any other god, not kill such life
as Allah has forbidden except for just cause, nor commit illegal sexual intercourse.' (25.68) And
there was also revealed:-- 'Say: O My slaves who have transgressed against their souls! Despair not of
the Mercy of Allah.' (39.53)
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 Messenger (ﷺ) 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)
A (Jewish) Rabbi came to Allah's Messenger (ﷺ) and he said, "O Muhammad! We learn that Allah will put all the heavens on one finger, and the earths on one finger, and the trees on one finger, and the water and the dust on one finger, and all the other created beings on one finger. Then He will say, 'I am the King.' Thereupon the Prophet (ﷺ) smiled so that his pre-molar teeth became visible, and that was the confirmation of the Rabbi. Then Allah's Messenger (ﷺ) recited: 'They made not a just estimate of Allah such as is due to Him. And on the Day of Resurrection the whole of the earth will be grasped by His Hand and the heavens will be rolled up in His Right Hand. Glorified is He, and High is He above all that they associate as partners with Him.' (39.67)