Volume 5, Book 58, Number 120:
Narrated Ghailan bin Jarir:
I asked Anas, "Tell me about the name 'Al-
Ansar.; Did you call yourselves by it or did
Allah call you by it?" He said, "Allah called us by
it." We used to visit Anas (at Basra) and he
used to narrate to us the virtues and deeds of
the Ansar, and he used to address me or a
person from the tribe of Al-Azd and say, "Your
tribe did so-and-so on such-and-such a day."