´Abu Hurairah narrated that Abul-Qasim, the Prophet of Repentance, said :` "If somebody slanders his slave (by accusing him of committing illegal sexual intercourse) and the slave is innocent from what he says, Allah will impose the punishment upon him on the Day of Resurrection, unless it is as he said about him."
Hadith Referenceسنن ترمذي / كتاب البر والصلة عن رسول الله صلى الله عليه وسلم / 1947
´Abu Mas'ud [Al-Ansari] said:` "I was beating a slave of mine and I heard someone behind me saying: 'Beware O Abu Mas'ud! Beware O Abu Mas'ud!' So I turned around and saw that it was the Messenger of Allah. He said: 'Allah has more power over you than you do over him." Abu Mas'ud said: "I have not beaten any slave of mine since then."
Hadith Referenceسنن ترمذي / كتاب البر والصلة عن رسول الله صلى الله عليه وسلم / 1948