Musnad Ahmad 28:412

Ya'la ibn 'Ubayd narrated to us, al-A'mash narrated to us, from Abu Sa'd, who said: A man came to 'Abdullah ibn 'Amr and said: "I only ask you about what you heard from the Messenger of Allah, may Allah bless him and grant him peace, and I do not ask you about the Torah." He said: I heard the Messenger of Allah, may Allah bless him and grant him peace, say: "The Muslim is the one from whose tongue and hand the Muslims are safe."