'Law of Moses' in the Bible

They want to be teachers of the law of Moses, even though they do not understand what they are saying or what they are affirming with [such] confidence.

But we know that the law of Moses is good if a person uses it properly.

We [also] know this: Law [or, "the law of Moses"] is not intended for a righteous person, but for lawbreakers and rebels, for ungodly people and sinners, for unholy and irreverent people, for people who kill their parents, for murderers,