NET

7 What shall we say then? Is the law sin? Absolutely not! Certainly, I would not have known sin except through the law. For indeed I would not have known what it means to desire something belonging to someone else if the law had not said, “Do not covet.”

Darby

7 What shall we say then? [is] the law sin? Far be the thought. But I had not known sin, unless by law: for I had not had conscience also of lust unless the law had said, Thou shalt not lust;

KJV

7 What shall we say then? [Is] the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.