'Works of the Law' in the Bible

Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.

This only would I learn of you, Received you the Spirit by the works of the law, or by the hearing of faith?

He therefore that ministers to you the Spirit, and works miracles among you, does he it by the works of the law, or by the hearing of faith?

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