Musannaf Ibn Abi Shayba 19:858

Abu Bakr narrated to us, he said: Mus'ab ibn al-Miqdam narrated to us, from 'Ikrimah ibn 'Ammar, from Iyas ibn Salamah, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever draws the sword against us, he is not of us."