Sayyiduna al-Nu'man bin Muqarrin (may Allah be pleased with him) narrates: We, four hundred people of the tribe of Muzaynah, came to the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) gave instructions concerning us. One of those present said: "O Messenger of Allah! We do not have enough grain to give them as provisions for the journey." The Prophet (peace and blessings be upon him) said to Sayyiduna Umar (may Allah be pleased with him): "Give them provisions for the journey!" He said: "I only have some leftover dates, and I do not think they will be of any use to them." The Prophet (peace and blessings be upon him) said: "Go and give them!" So he took us to an upper room, and there were dates there as large as a young ash-coloured camel. Sayyiduna Umar (may Allah be pleased with him) said: "Take!" All the people began taking according to their need, and I was the last of those taking. The narrator says: I looked, and I did not notice anything missing from the place of the dates, although four hundred men had taken dates from there.
Ahmad and al-Tabarani recorded it, and Ahmad's narrators are the narrators of the Sahih.