Exodus 32:27
King James Version
“And he said unto them, Thus saith the LORD God of Israel, Put every man his sword by his side, go in and out from gate to gate throughout the camp, and slay every man his brother, and every man his companion, and every man his neighbour.”
Context
24And I said unto them, Whosoever hath any gold, let them break off. So they gave me: then I cast it into the fire, and there came out this calf.
25And when Moses saw that the people naked; (for Aaron had made them naked unto shame among their enemies:)
26Then Moses stood in the gate of the camp, and said, Who on the LORD’S side? unto me. And all the sons of Levi gathered themselves together unto him.
27And he said unto them, Thus saith the LORD God of Israel, Put every man his sword by his side, go in and out from gate to gate throughout the camp, and slay every man his brother, and every man his companion, and every man his neighbour.
28And the children of Levi did according to the word of Moses: and there fell of the people that day about three thousand men.
29For Moses had said, Consecrate yourselves to day to the LORD, even every man upon his son, and upon his brother; that he may bestow upon you a blessing this day.
30And it came to pass on the morrow, that Moses said unto the people, Ye have sinned a great sin: and now I will go up unto the LORD; peradventure I shall make an atonement for your sin.