Sayyiduna Salman al-Farisi (may Allah be pleased with him) narrates: I came to the Prophet (peace and blessings be upon him) with food; at that time I was someone's slave. I said: This is charity (sadaqah). The Prophet (peace and blessings be upon him) ordered his Companions, and they ate it, but the Prophet (peace and blessings be upon him) himself did not eat it. Then I came to the Prophet (peace and blessings be upon him) with food and said: This is a gift which I present to you, so that in this way I may honour you, because I have seen that you do not eat charity. The Prophet (peace and blessings be upon him) ordered his Companions, and they ate it, and the Prophet (peace and blessings be upon him) also ate it with them.
Imam Ahmad recorded it; its chain contains a narrator, Ibn Ishaq, who is thiqah (trustworthy) and is a mudallis, and the remaining narrators of this report are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البيوع / 6813