Exodus 32:27-29 ▼

27 and he told them, “Thus says the LORD, the God of Israel: Each of you put your sword on your hip! Go back and forth through the camp, from gate to gate, and kill your brothers, your friends, your neighbors!”

28 The Levites did as Moses had commanded, and that day about three thousand of the people fell.

29 Then Moses said, “Today you are installed as priests for the LORD, for you went against your own sons and brothers, to bring a blessing upon yourselves this day.”