It was narrated that Ibn 'Abbas (رضي الله عنه) said: A man said:

How much water is enough for wudoo’? He said: A mudd. He said: How much is sufficient for ghusl? He said: A sa'. The man said: That is not enough for me. He said: May you have no mother! It was enough for one who is better than you, the Messenger of Allah (ﷺ).