2 Kings 5:14-15

14So he went down and dipped in the Jordan seven times, as the prophet had instructed. His skin became as smooth as a young child’s and he was healed.

15He and his entire entourage returned to the prophet. Naaman came and stood before him. He said, “For sure I know that there is no God in all the earth except in Israel! Now, please accept a gift from your servant.”