Melaḵim Bĕt (2 Kings) 5:13-14

And his servants came near and spoke to him, and said, “My father, if the prophet had spoken to you a great matter, would you not have done it? How much more then, when he says to you, ‘Wash, and be clean’?” Then he went down and dipped seven times in the Yardĕn, according to the word of the man of Elohim. And his flesh was restored like the flesh of a little child, and he was clean.