Chapter 1: The Book of Purification
It was narrated that Abu Ja' far said: "We argued about Ghusl in the presence of jabir in 'Abdullah, and Jabir said: 'One Sa' of water is sufficient for ghusl from Janabah.' We said: 'One Sa' is not enough and neither is two.' Jabir said: 'It was sufficient for one who was better than you and had more hair.'"
Sunan an-Nasa'i 230