Sahih Bukhari

Narrated Abu Ja`far:While I and my father were with Jabir bin `Abdullah, some people asked him about taking a bath. He replied, ""A Sa` of water is sufficient for you."" A man said, ""A Sa` is not sufficient for me."" Jabir said, ""A Sa` was sufficient for one who had more hair than you and was better than you (meaning the Prophet)."" And then Jabir (put on) his garment and led the prayer