Deuteronomy 7:12-13

12If 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.

13He will love and bless you, and make you numerous. He will bless you with many children, with the produce of your soil, your grain, your new wine, your oil, the offspring of your oxen, and the young of your flocks in the land which he promised your ancestors to give you.