Deuteronomy 9:18-20

181Then I fell down before the Lord 2like the first time, for forty days and nights; 3I neither ate bread nor drank water, 4because of all your sin which you had committed by doing what was evil in the sight of the Lord, to provoke Him to anger.

19For 5I was afraid of the anger and the rage with which the Lord was angry with you so as to destroy you; 6but the Lord listened to me that time as well.

20The Lord was also angry enough with Aaron to destroy him; so I also prayed for Aaron at the same time.