Deuteronomy 9:18-19

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.