Musnad Ahmad 32:429

Bahz narrated to us, Shu'bah narrated to us, he said: Abdullah ibn Jabr al-Ansari narrated to me, he said: I heard Anas ibn Malik saying: The Messenger of Allah, peace and blessings of Allah be upon him, said: "The sign of hypocrisy is hatred of the Ansar, and the sign of faith is love of the Ansar."