Musannaf Ibn Abi Shaybah

Hazrat Rabee’ bin Abi Rashid (may Allah have mercy on him) says that my respected father, Khulaf bin Houshab, used to be very amazed at someone. I said to him, “O father, do you wonder at this person?” He replied, “O my son, this person walked on a good path and remained steadfast upon it.” Abi Rashid says that at that time his kunyah was Abu Marzooq, so Rabee’ (may Allah have mercy on him) said to him, “You should change this kunyah.” Abi Rashid says that Khulaf (may Allah have mercy on him) said to him, “Then you yourself give me a kunyah.” So he said, “You are Abu Abdur Rahman.”