Deuteronomy 9:18-20

18And I fell down before Jehovah, as at the first, forty days and forty nights, — I ate no bread and drank no water, — because of all your sin which ye had sinned, in doing what is evil in the eyes of Jehovah, to provoke him to anger.

19For I was afraid of the anger and fury wherewith Jehovah was wroth against you to destroy you. And Jehovah listened unto me also at that time.

20And with Aaron Jehovah was very angry to destroy him; and I prayed for Aaron also at the same time.