Deuteronomy 11:28

11:28 and the curse if you pay no attention to his commandments and turn from the way I am setting before you today to pursue other gods you have not known.

Deuteronomy 16:1

The Passover-Unleavened Bread Festival

16:1 Observe the month Abib and keep the Passover to the Lord your God, for in that month he brought you out of Egypt by night.

Deuteronomy 27:6

27:6 You must build the altar of the Lord your God with whole stones and offer burnt offerings on it to the Lord your God.