Musannaf Ibn Abi Shayba 1:1988

Waki’ narrated to us, from al-A’mash, from al-Musayyab ibn Rafi’, from Bashir (or Busr) ibn ‘Uqbah ibn ‘Amr, who said: I saw Abu Mas’ud urinate, then he performed ablution and wiped over his socks.