2 Kings 5:14-17

14So Naaman went down to the Jordan River. He washed himself in it seven times, as the man of God had told him to do. Naaman's skin became well again. It became as clean as a young child's skin.

15Then Naaman and all his servants went back to see Elisha, the man of God. Naaman stood in front of him and he said, ‘Now I know that there is no God in the whole world except the one in Israel. Please accept a gift from me, your servant.’

16But Elisha replied, ‘I serve the Lord. I promise you, as surely as he lives, I will not accept a gift from you.’ Naaman asked him many times to accept a gift but Elisha refused.

17So Naaman said, ‘So, you will not accept my gift. But please agree to let me take home some soil from here. I will take as much soil as two mules can carry. Then I will never again make any sacrifices or burnt offerings to any other god. I will only worship the Lord.