Musannaf Ibn Abi Shayba 26:353

Abu Mu'awiyah narrated to us, from al-A'mash, from Abu 'Amr al-Shaybani, that Ali was brought al-Mustawrid al-'Ijli, and he had apostatized. He offered Islam to him, but he refused, so he killed him and placed his inheritance among his heirs who were Muslims.