'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 faith in Christ, and not by works of the law; because by the works of the law shall no flesh be justified.

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

He therefore who ministereth to you a supply of the Spirit, and powerfully worketh miracles among you, doth he it by the works of the law, or by the hearing of the faith?

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