Deuteronomy 9:16-21

16And I looked, and behold, you had sinned against the LORD your God. You had made yourselves a golden calf. You had turned aside quickly from the way that the LORD had commanded you. 17So I took hold of the two tablets and threw them out of my two hands and broke them before your eyes. 18Then I lay prostrate before the LORD as before, forty days and forty nights. I neither ate bread nor drank water, because of all the sin that you had committed, in doing what was evil in the sight of the LORD to provoke him to anger. 19For I was afraid of the anger and hot displeasure that the LORD bore against you, so that he was ready to destroy you. But the LORD listened to me that time also. 20And the LORD was so angry with Aaron that he was ready to destroy him. And I prayed for Aaron also at the same time. 21Then I took the sinful thing, the calf that you had made, and burned it with fire and crushed it, grinding it very small, until it was as fine as dust. And I threw the dust of it into the brook that ran down from the mountain.