2 Kings 10:8-10

8When a messenger came and told him, “They have brought the heads of the king’s sons,” he said, “Put them in two heaps at the entrance of the city gate until morning.”

9The next morning he went out and stood and said to all the people, “You are just and innocent; behold, I conspired against [Joram] my master and killed him, but who killed all these?

10Know then [without any doubt] that there shall fall to the earth nothing of the word of the Lord, which the Lord spoke concerning the house of Ahab, for the Lord has done what He said through His servant Elijah.”