2 Kings 5:9-12

So Naaman came with his horses and chariots and stood at the door of Elisha’s house. Then Elisha sent him a messenger, who said, “Go wash seven times in the Jordan and your skin will be restored and you will be clean.” But Naaman got angry and left, saying, “I was telling myself: He will surely come out, stand and call on the name of the LORD his God, and wave his hand over the place and cure the skin disease. Aren’t Abana and Pharpar, the rivers of Damascus, better than all the waters of Israel? Couldn’t I wash in them and be clean?” So he turned and left in a rage.