Exodus 32:26-29 ▼

26 so Moses stood in the gate of the camp and said, “Whoever is for Yahweh, come to me!” And all the sons of Levi gathered together to him.

27 And he said to them, “Thus says Yahweh, the God of Israel, ‘Every man among you put his sword upon his thigh, and go back and forth from gate to gate in the camp, and kill every man his brother and every man his friend and every man his neighbor.’”

28 So the sons of Levi did according to the word of Moses, and about three thousand men of the people fell that day.

29 Then Moses said, “Be ordained today to Yahweh—for every man has been against his son and against his brother—in order that He may bestow a blessing upon you today.”