2 Kings 10:8-10

8When the messenger came and told him, "They have brought the heads of the king's sons," he said, "Lay them in two heaps at the entrance of the gate until the morning."

9Then in the morning, when he went out, he stood and said to all the people, "You are innocent. It was I who conspired against my master and killed him, but who struck down all these?

10Know then 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 by his servant Elijah."