1 Kings 20:39-42

39As the king passed by, he cried out to the king: “Your servant had marched out into the middle of the battle, when suddenly a man came over with a captive and told me, ‘Guard this man! If he goes missing for any reason, your life will be exchanged for his life, or you will weigh out a talent of silver.1’ 40But while your servant was busy here and there, the man disappeared.”

And the king of Israel said to him, “So shall your judgment be; you have pronounced it on yourself.”

41Then the prophet quickly removed the bandage from his eyes, and the king of Israel recognized him as one of the prophets.

42And the prophet said to the king, “This is what the LORD says: ‘Because you have let slip from your hand the man I had devoted to destruction,2 your life will be exchanged for his life, and your people for his people.’”