Deuteronomy 8:20

8:20 Just like the nations the Lord is about to destroy from your sight, so he will do to you because you would not obey him.

Deuteronomy 7:12

Promises of Good for Covenant Obedience

7:12 If you obey these ordinances and are careful to do them, the Lord your God will faithfully keep covenant with you as he promised your ancestors.