2 Kings 5:13-14

His servants went up to him and said, “Sir, if the prophet had told you to do something difficult, you would have done it. Now why can't you just wash yourself, as he said, and be cured?” So Naaman went down to the Jordan, dipped himself in it seven times, as Elisha had instructed, and he was completely cured. His flesh became firm and healthy, like that of a child.