Musannaf Ibn Abi Shaybah

It is narrated from Ibn Aun that there was a man who rented himself out for one thousand dirhams for a year. He said to me, "Ask Muhammad, may Allah have mercy on him, about this. Indeed, these people have hastened the matter for me." I asked Muhammad, may Allah have mercy on him, about it. He said: "I do not see any harm in it."