Deuteronomy 11:26-28
26 Behold, I set before you this day a blessing and a curse;
27 A blessing, if ye obey the commandments of the LORD your God, which I command you this day:
28 And a curse, if ye will not obey the commandments of the LORD your God, but turn aside out of the way which I command you this day, to go after other gods, which ye have not known.