Musannaf Ibn Abi Shayba 17:1194

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Al-A’mash narrated to us, from Abu Sufyan, from Jabir, who said: A man came to the Prophet, may God bless him and grant him peace, and said: "O Messenger of God, which of the Muslims is best?" He said: "He from whose tongue and hand the Muslims are safe."