Exodus 32:19-30

32:19 When he approached the camp and saw the calf and the dancing, Moses became extremely angry. He threw the tablets from his hands and broke them to pieces at the bottom of the mountain. 32:20 He took the calf they had made and burned it in the fire, ground it to powder, poured it out on the water, and made the Israelites drink it.

32:21 Moses said to Aaron, “What did this people do to you, that you have brought on them so great a sin?” 32:22 Aaron said, “Do not let your anger burn hot, my lord; you know these people, that they tend to evil. 32:23 They said to me, ‘Make us gods that will go before us, for as for this fellow Moses, the man who brought us up out of the land of Egypt, we do not know what has happened to him.’ 32:24 So I said to them, ‘Whoever has gold, break it off.’ So they gave it to me, and I threw it into the fire, and this calf came out.”

32:25 Moses saw that the people were running wild, for Aaron had let them get completely out of control, causing derision from their enemies. 32:26 So Moses stood at the entrance of the camp and said, “Whoever is for the Lord, come to me.” All the Levites gathered around him, 32:27 and he said to them, “Thus says the Lord, the God of Israel, ‘Each man fasten his sword on his side, and go back and forth from entrance to entrance throughout the camp, and each one kill his brother, his friend, and his neighbor.’”

32:28 The Levites did what Moses ordered, and that day about three thousand men of the people died. 32:29 Moses said, “You have been consecrated today for the Lord, for each of you was against his son or against his brother, so he has given a blessing to you today.”

32:30 The next day Moses said to the people, “You have committed a very serious sin, but now I will go up to the Lord – perhaps I can make atonement on behalf of your sin.”