Exodus 32:27-29

New International Version

²⁷ Then he said to them, “This is what the Lord, the God of Israel, says: ‘Each man strap a sword to his side. Go back and forth through the camp from one end to the other, each killing his brother and friend and neighbor.’”^{(A) 28} The Levites did as Moses commanded, and that day about three thousand of the people died. ²⁹ Then Moses said, “You have been set apart to the Lord today, for you were against your own sons and brothers, and he has blessed you this day.”