2 Kings 5:13-14

Then his servants came near and spoke to him and said, “My father, had the prophet told you to do some great thing, would you not have done it? How much more then, when he says to you, ‘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; and his flesh was restored like the flesh of a little child and he was clean.