Musnad Ahmad 32:2019

Abdullah narrated to us, Ubaydullah ibn Mu'adh narrated to me, my father narrated to us, Shu'bah narrated to us, from Qatadah, from Anas ibn Malik, who said: The Prophet, may Allah bless him and grant him peace, said: "None of you believes until he loves for his brother what he loves for himself."