Musannaf Ibn Abi Shaybah 24261 — A man who sells something that is not

It is narrated from Sayyiduna Ali (may Allah be pleased with him) that a man had a garment in his possession, and another man established witnesses against him that the garment was his. Sayyiduna Ali (may Allah be pleased with him) said to him: "Hand his garment over to him, and recover your loss from the one you bought it from."
Ibn Sirin said: The judges used to rule, concerning one who sells something that is not his, that it belongs to its owner when he claims it, and this man (the seller) is held liable for its equivalent.