Musnad Abu Ya'la al-Mawsili 116:47

Ahmad narrated to us, Wahb bin Jarir narrated to us, Shu'bah narrated to us, from Qatadah, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Do not cut ties with one another, do not hate one another, and do not envy one another. And be, O servants of Allah, brothers, just as Allah has commanded you."