John Gill

But he said, as the Lord liveth, before whom I stand,.... Whose minister and prophet he was, and by whom he swears: I will receive none: to let him know that this cure was not to be attributed to him, but the Lord only; and that what concern he had in it was not for the sake of money, but for the glory of the God of Israel: and he urged him to take it, but he refused it; Naaman was very pressing upon him to receive a gift from him, but he could not be prevailed upon to accept it.