And it came to pass as soon as he had made an end of offering the burnt offering, that Jehu said to the guard and to the captains, “Go in and kill them! Let none escape.” So they struck them with the mouth of the sword and the guard and the captains cast them out and went to the city of the house of Baal. Bible

“the mouth of the sword.” Used to show great destruction, as if the sword was eating its victims (see commentary on Josh. 6:21).

Commentary for: 2 Kings 10:25