Khidash Abu Salamah (may Allah be pleased with him) says that the Prophet (peace and blessings be upon him) said: "I enjoin a man regarding his mother three times, and I enjoin him regarding his father twice, and I enjoin him regarding his slave, even if he is a source of harm to him that troubles him."
The Shaykh said: The students of Mansur differed with one another, in what they narrated from Mansur, about the names of the narrators.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7767