John Gill Commentary 2 Kings 5:16

"But he said, As Jehovah liveth, before whom I stand, I will receive none. And he urged him to take it; but he refused." — 2 Kings 5:16 (ASV)

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.