Paul asks a question that one of his readers might have. Alternate translation: "Someone might say that we can ignore the law because we have faith." (See: [[rc://en/ta/man/translate/figs-rquestion]])
This expression gives the strongest possible negative answer to the preceding rhetorical question. You may have a similar express in your language that you could use here. Alternate translation: "This is certainly not true" or "Certainly not" (See: [[rc://en/ta/man/translate/figs-rquestion]])