Musannaf Ibn Abi Shayba 1:1910

'Affan narrated to us, he said: 'Abd al-Warith narrated to us, he said: Ayyub al-Sakhtiyani narrated to us, from Yazid ibn Mu'taq, from Mutarrif, who said: I entered upon 'Ammar and found him while he was in the privy. He came out and performed ablution and wiped over the two leather socks.