But as for you, stand here with Me and I shall speak to you the entire commandments, and the decrees, and the ordinances that you shall teach them and they shall perform in the Land that I give them, to possess it.”
You shall be careful to act as Hashem, your God, commanded you, you shall not stray to the right or left.
Devarim (Deuteronomy) 5:28-29 (31-32 in CB)