Deuteronomy 7:12-13

12Therefore it shall come to pass, if ye hearken to these judgments, and keep, and do them, that the LORD thy God shall keep to thee the covenant and the mercy which he swore to thy fathers:1 13And he will love thee, and bless thee, and multiply thee: he will also bless the fruit of thy womb, and the fruit of thy land, thy grain, and thy wine, and thy oil, the increase of thy cattle, and the flocks of thy sheep, in the land which he swore to thy fathers to give thee.