The term, “the Law of God”, or “the Law” most often in the Scriptures refers to the Mosaic Covenant, also known as the Law of Moses. The law (torah in Hebrew, hō nomos in Greek) refers primarily (though not exclusively) to the Sinai covenant and its renewal at Moab in Deuteronomy 30. It was given by the LORD as a binding covenant to Israel around 1445BC. And it is organically related to the Creation, Noahic and Abrahamic covenants that came before it. It relies on them. The Mosaic Covenant, the Law of Moses, was a conditional covenant, with wonderful promises for keeping it, and curses for breaking it.
Now this is vitally important: An Israelite keeping the Law of Moses or any of us keeping the law of God in general leads to eternal life. But here’s the catch, only if one does this perfectly consistently without fail their entire life. Matt. 5:48 “Therefore you are to be perfect, as your heavenly Father is perfect.” As a matter of fact, no one except Jesus has kept the Law perfectly. No ancient Israelite was ever justified/saved eternally by keeping the Law of Moses. “The just shall live by faith” is the testimony of Scripture. Faith in God alone saves eternally in all dispensations.
But in many ways, the Law anticipates, necessitates and points forward to the coming of Christ as both the completed covenant sacrifice and the fulfillment of the Law. And the blessing of this abounds to Jew and Gentile in this church age, and as the gracious blood shed for the dawning of the New Covenant of perfect Spirit enabled obedience for Israel and Judah in the yet coming kingdom. So shall we feast on God’s word of revelation to us?