The Law of Moses: All Israelites Required: To Observe
Source: TTT
Deuteronomy 4:6
Observe them carefully, for this will show your wisdom and understanding in the sight of the peoples, who will hear of all these statutes and say, “Surely this great nation is a wise and understanding people.”
Deuteronomy 6:2
so that you and your children and grandchildren may fear the LORD your God all the days of your lives by keeping all His statutes and commandments that I give you, and so that your days may be prolonged.