2 Kings 5:13-14

But his servants came near and spoke to him and said, “My father, if the prophet had spoken a difficult thing to you to do, would you not have done it? Why not even when he says to you, ‘Wash and you shall be clean’?” So he went down and plunged into the Jordan seven times, according to the word of the man of God, and his flesh returned as the flesh of a small boy, and he was clean.