Exodus 32:27-29

Darby Translation

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.

²⁹ And Moses said, Consecrate yourselves to-day to Jehovah, yea, every man with his son, and with his brother, and bring on yourselves a blessing to-day.