Kings IV 5:10

10 And Elisaie sent a messenger to him, saying, Go and wash seven times in Jordan, and thy flesh shall return to thee, and thou shalt be cleansed.

Kings IV 5:10 In-Context

8 And it came to pass, when Elisaie heard that the king of Israel had rent his garments, that he sent to the king of Israel, saying, Wherefore hast thou rent thy garments? Let Naiman, I pray thee, come to me, and let him know that there is a prophet in Israel.
9 So Naiman came with horse and chariot, and stood at the door of the house of Elisaie.
10 And Elisaie sent a messenger to him, saying, Go and wash seven times in Jordan, and thy flesh shall return to thee, and thou shalt be cleansed.
11 And Naiman was angry, and departed, and said, Behold, I said, He will by all means come out to me, and stand, and call on the name of his God, and lay his hand upon the place, and recover the leper.
12 not the Abana and Pharphar, rivers of Damascus, better than all the waters of Israel? may I not go and wash in them, and be cleansed? and he turned and went away in a rage.

The Brenton translation of the Septuagint is in the public domain.