Muhajir, the freed slave of Sayyidah Umm Salamah (may Allah be pleased with her), narrates: I served the Prophet (peace and blessings be upon him) for some years. If I did something, the Prophet (peace and blessings be upon him) never said about it: Why did you do this? And about something I had left undone, he did not say: Why did you leave it?
Imam al-Tabarani recorded this narration, and its chain contains a narrator whom I do not know.