2 Kings 10:8-10

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

9So it was, in the morning, that he went out and stood, and said to all the people, “You are righteous. Indeed I conspired against my master and killed him; but who killed all these?

10Know now that nothing shall fall to the earth of the word of the Lord which the Lord spoke concerning the house of Ahab; for the Lord has done what He spoke by His servant Elijah.”