Musannaf Ibn Abi Shayba 3:2434

Abu Bakr narrated to us, he said: Sufyan ibn 'Uyaynah narrated to us, from Zayd ibn Aslam, from Ibn 'Umar, he said: I asked Suhayb, "How did the Messenger of Allah (peace and blessings of Allah be upon him) do when he was greeted with peace?" He said: "He would gesture with his hand."