Musannaf Ibn Abi Shayba 13:1594

Abu Bakr narrated to us, he said: Muhammad ibn Abi ‘Adi narrated to us, from Ibn ‘Awn, who said: I asked Muhammad about a man who gives a garment to a weaver for a third [of the profit] and a dirham, or for a fourth, or for whatever they agree upon. He said: I do not see any harm in it.