“For if they which are of the law be heirs, faith is made void, and the promise made of none effect:”
King James Version (KJV)
4:14 If they only who are of the law - Who have kept the whole law. Are heirs, faith is made void - No blessing being to be obtained by it; and so the promise is of no effect.
Ro 4:14 For if they who are of the law [are] heirs. "Of law", the article wanting. If keeping law makes men heirs, then faith is made void. It sets aside God's plan of "counting faith as righteousness", and destroys the promise which depends on faith.