2 Kings 5:14, 15, 16, 17

So Naaman went down and plunged into the Jordan seven times, according to the word of the man of God. His flesh became again like the flesh of a little child, and he was clean.

He returned with his whole retinue to the man of God. On his arrival he stood before him and said, “Now I know that there is no God in all the earth, except in Israel. Please accept a gift from your servant.”

Elisha replied, “As the LORD lives whom I serve, I will not take it.” And despite Naaman’s urging, he still refused.

Naaman said: “If you will not accept, please let me, your servant, have two mule-loads of earth, for your servant will no longer make burnt offerings or sacrifices to any other god except the LORD.