Musnad Ahmad 30:2910

Muhammad ibn Ja‘far narrated to us, he said: Shu‘bah and Hajjaj narrated to us, he said: Shu‘bah informed us, from Sa‘d ibn Ibrahim, from ‘Abd al-Rahman al-A‘raj—as I think, Shu‘bah doubted—from Abu Hurayrah, from the Prophet, may Allah bless him and grant him peace, that he said: "Quraysh, the Ansar, Aslam, Ghifar, Juhaynah, Muzaynah, and Ashja‘ are allies (mawali). They have no ally (mawla) other than Allah and His Messenger."