2 Kings 5:13-14

But his servants approached him and spoke to him, and said, “My father, if the prophet had told you to do something difficult, would you not have done it? How much more then, when he told you only to ‘Wash and be clean’?” So, he went down and dipped himself seven times in the Jordan, according to the word of the man of God. Then his flesh was restored like the flesh of a little child, and he was clean.