Deuteronomy 12:28
12:28 Pay careful attention to all these things I am commanding you so that it may always go well with you and your children after you when you do what is good and right in the sight of the Lord your God.
Deuteronomy 12:32
Idolatry and False Prophets
12:32 (13:1) You must be careful to do everything I am commanding you. Do not add to it or subtract from it!