2 Kings 5:10, 12-13

Elisha sent a messenger to him, saying, “Go and wash in the Jordan seven times, and your flesh will be restored to you and you will be clean.”

Are not Abana and Pharpar, the rivers of Damascus [in Aram], better than all the waters of Israel? Could I not wash in them and be clean?” So he turned and went away in a rage. Then his servants approached and said to him, “My father, if the prophet had told you to do some great thing, would you not have done it? How much more then, when he has said to you, ‘Wash, and be clean?’ ”