Deuteronomy 11:26-28

MKJV(i) 26 Behold, I set before you today a blessing and a curse: 27 A blessing if you obey the commandments of Jehovah your God which I command you today, 28 and a curse if you will not obey the commandments of Jehovah your God, but will turn aside out of the way which I command you today, to go after other gods which you have not known.