Exodus 32:26-28

Darby Translation

²⁶ And Moses stood in the gate of the camp, and said, He that is for Jehovah, [let him come] to me. And all the sons of Levi gathered to him.

²⁷ And he said to them, Thus saith Jehovah, the God of Israel: Put every man his sword upon his hip; go and return from gate to gate through the camp, and slay every man his brother, and every man his friend, and every man his neighbour.

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