Musnad Ahmad 5:717

Abdullah narrated to us, Ubaydullah ibn Umar al-Qawariri narrated to me, al-Sakan ibn Ibrahim narrated to us, al-Ash'ath ibn Siwar narrated to us, from Ibn Ashwa', from Hanash al-Kinani, from Ali: That he sent his chief of police and said to him: "Do you know what I am sending you for? For what the Messenger of Allah, peace and blessings of Allah be upon him, sent me for: 'That you efface every image, and that you level every grave.'" *** Abdullah narrated to us, my father narrated to me, and Abu Bakr ibn Abi Shaybah narrated to me, they both said: Husayn ibn Ali narrated to us, from Za'idah, from Simak, from Hanash, from Ali, he said: The Messenger of Allah, peace and blessings of Allah be upon him, said to me: "If two men come to you for judgment, do not judge for the first until you hear what the other says, for then you will see how you judge."