2 Kings 5:9-10, 12

So Naaman went with his horses and chariots and waited at the door of Elisha’s house. But Elisha sent a messenger out to him with this message: “Go and wash yourself seven times in the Jordan River. Then your skin will be restored, and you will be healed of your leprosy.”

Aren’t the rivers of Damascus, the Abana and the Pharpar, better than any of the rivers of Israel? Why shouldn’t I wash in them and be healed?” So Naaman turned and went away in a rage.