Musannaf Ibn Abi Shayba 13:2073

Abu Bakr narrated to us, he said: Ibn Abi Za'idah narrated to us, from Muhammad ibn 'Amr, from Abu Salamah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Do not outbid one another (to deceive), do not hate one another, and do not envy one another. And be, O servants of Allah, brothers."