2 Kings 10:24-25

24So they went in to make sacrifices and burnt offerings. Now Jehu had posted eighty men outside with this warning: “If one of you lets any of the men I am placing in your hands escape, it will be your life for his life.” 25As soon as Jehu had finished making the burnt offering, he ordered the guards and officers: “Go in and kill them; let no one escape.” So they cut them down with the sword. The guards and officers threw the bodies out and then entered the inner shrine of the temple of Baal.