24 So 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.”

Read 2 Kings 10:24 Using Other Translations

And when they went in to offer sacrifices and burnt offerings, Jehu appointed fourscore men without, and said, If any of the men whom I have brought into your hands escape, he that letteth him go, his life shall be for the life of him.
Then they went in to offer sacrifices and burnt offerings. Now Jehu had stationed eighty men outside and said, "The man who allows any of those whom I give into your hands to escape shall forfeit his life."
So they were all inside the temple to offer sacrifices and burnt offerings. Now Jehu had stationed eighty of his men outside the building and had warned them, “If you let anyone escape, you will pay for it with your own life.”