2 Kings 5:10

5:10 Elisha sent out a messenger who told him, “Go and wash seven times in the Jordan; your skin will be restored and you will be healed.”

2 Kings 5:12-13

5:12 The rivers of Damascus, the Abana and Pharpar, are better than any of the waters of Israel! Could I not wash in them and be healed?” So he turned around and went away angry. 5:13 His servants approached and said to him, “O master, if the prophet had told you to do some difficult task, you would have been willing to do it. It seems you should be happy that he simply said, “Wash and you will be healed.”