Musannaf Ibn Abi Shayba 27:470

Malik ibn Isma'il narrated to us, he said: Mis'ar ibn Sa'd narrated to us, he said: Muhammad ibn Ishaq narrated to us, from al-Fadl ibn Ma'qil, from 'Abdullah ibn Ma'qil, from 'Abdullah ibn Nayyar al-Aslami, from 'Amr ibn Shas, he said: The Messenger of Allah, peace and blessings of Allah be upon him, said to me: "You have harmed me." I said: "O Messenger of Allah, I would not like to harm you." He said: "Whoever harms 'Ali has harmed me."