2 Kings 5:13-14

13And his servants came near, and spoke to him, and said, My father, if the prophet had bid thee do some great thing, wouldest thou not have done it ? how much rather then, when he saith to thee, Wash, and be clean? 14Then he went down, and dipped himself seven times in Jordan, according to the saying of the man of God: and his flesh came again like the flesh of a little child, and he was clean.