Musnad Ahmad 30:786

Yazid narrated to us, Mas'udi informed us, from Sa'd ibn Ibrahim, from Abd al-Rahman ibn Hurmuz, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Quraysh, the Ansar, Juhaynah, Muzaynah, Aslam, Ghifar, and Ashja' are my allies (mawali). They have no ally besides Allah and His Messenger."