Majma al-Zawaid — Hadith 14109

Sayyiduna Ali (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) gathered Banu Abd al-Muttalib. Among them were some people who could eat an entire young goat and drink a large bucket of water. The Prophet (peace and blessings be upon him) prepared food for them from one mudd of grain. They ate it until they were full, and still the food remained just as it had been before, as though it had not even been touched. Then the Prophet (peace and blessings be upon him) called for a small cup (of water). They drank from it until they were satisfied, and the drink still remained as though it had not even been touched or drunk. The Prophet (peace and blessings be upon him) said: "O children of Abd al-Muttalib! I have been sent to you specifically and to mankind in general, and you have seen this sign (that is, miracle) that you have seen. So which of you will pledge allegiance to me on this: that he will be my brother and my companion?" The narrator says: No one stood up before him (peace and blessings be upon him). I stood up before him, although I was the youngest of them all. The Prophet (peace and blessings be upon him) said: "Sit down!" This happened three times; each time it was I who stood up, and the Prophet (peace and blessings be upon him) would say to me: "Sit down!" Until, when it happened the third time, the Prophet (peace and blessings be upon him) placed his hand on my hand.
Ahmad recorded it, and its narrators are thiqat (trustworthy).