Abdullah bin 'Isa bin 'Abdur Rahman عبد الله بن عيسى بن عبد الرحمن · General Behavior (Kitab Al-Adab)

I came to Ibn ‘Umar when he set his slave free. He took a stick or something else from the earth and said; for me there is no reward even equivalent to this. I heard the Messenger of Allah (May peace be upon him) say: If anyone slaps or beats his slave the atonement due from him is to set him free.