Musannaf Ibn Abi Shayba 3:2835

Abu Bakr narrated to us, he said: Hafs narrated to us, from al-A'mash, from Abu Sufyan, from Jabir, who said: Sulayk al-Ghatafani came while the Prophet, peace and blessings of Allah be upon him, was delivering the sermon on Friday. He said to him, "Have you prayed?" He said, "No." He said, "Pray two rak'ahs and make them brief."