'Works of the Law' in the Bible

knowing that a man is not justified by works of the law but by the faith of Jesus Christ, we also have believed in Jesus Christ, that we may be justified by faith and not by works of the law, because by works of the law shall no flesh be justified.

This only would I learn of you. Did you receive the Spirit by works of the law, or by a hearing of faith?

He then that imparts to you the Spirit, and exercises miraculous powers among you, does he do it by works of the law, or by the doctrine of faith?

For as many as are of works of the law are under a curse; for it is written, Cursed is every one that continues not in all things written in the book of the law to do them.