2 Kings 10:24-25

24And they went in1 to offer sacrifices and burnt offerings. Now Jehu had stationed eighty men outside and warned them, “If anyone allows one of the men I am delivering into your hands to escape, he will forfeit his life for theirs.”

25When he had finished making the burnt offering, Jehu said to the guards and officers, “Go in and kill them. Do not let anyone out.”

So the guards and officers put them to the sword, threw the bodies out, and went into the inner room of the temple of Baal.