Zayd bin al-Habab al-'Akli زيد بن الحباب أبو الحسين العكلي · General Behavior (Kitab Al-Adab)

if anyone says a hundred times in the morning: “Glory be to Allah, the Sublime, and I begin with praise of him”, and says likewise in the evening, no one from the creatures will bring anything like the one which he will bring.

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.