Musannaf Ibn Abi Shayba 13:2820

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Isra’il, from Simak, from Hujjar ibn Abjar: Regarding Ali, concerning a man who had a garment in his possession, and another man established evidence against him [that it was his]. He said: "Hand over the garment to this man, and pursue the one from whom you bought it."