Musannaf Ibn Abi Shayba 3:2705

Abu Dawud al-Tayalisi narrated to us, from Qurrah ibn Khalid, who said: Muhammad ibn Sirin narrated to us, from Aflah, the freed slave of Abu Ayyub, who said: Ibn Salam used to come to us on the day of Friday, and he would hang a water skin with him, and he would gather [water] from the high grounds (al-Awali).