2 Kings 5:13-14

But 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 should you do it when he only tells you, ‘Wash and be clean’?” So Naaman went down and dipped himself in the Jordan seven times, according to the command of the man of God. Then his skin was restored and became like the skin of a small boy, and he was clean.