Exodus 32:27-28

NHEB(i) 27 He said to them, "Thus says the LORD, the God of Israel, 'Every man put his sword on his thigh, and go back and forth from gate to gate throughout the camp, and every man kill his brother, and every man his companion, and every man his neighbor.'" 28 The sons of Levi did according to the word of Moses: and there fell of the people that day about three thousand men.