Exodus 32:27-28

Rotherham(i) 27 And he said to them––Thus, saith Yahweh, God of Israel, Put ye every man his sword upon his thigh,––pass through and return, from gate to gate, in the camp, and slay ye every man his brother, and every man his friend, and every man his neighbour. 28 So the sons of Levi did, according to the word of Moses,––and there fell, from among the people, on that day, about three thousand men.