Jude 1:3
3 Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints.
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.