Musannaf Ibn Abi Shayba 27:613

Yahya ibn Adam narrated to us, he said: Umar ibn Abi Za’idah narrated to us, from Wardan the Mu’adhdhin, that he heard al-Qasim ibn Mukhaymirah say: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Ammar has been filled with faith up to the bone joints, and he is among those whom the Fire is forbidden to touch."