Deuteronomy 28:47-50

47because thou servedst not the LORD thy God with joyfulness, and with gladness of heart, by reason of the abundance of all things:

48therefore shalt thou serve thine enemies which the LORD shall send against thee, in hunger, and in thirst, and in nakedness, and in want of all things: and he shall put a yoke of iron upon thy neck, until he have destroyed thee.

49The LORD shall bring a nation against thee from far, from the end of the earth, as the eagle flieth; a nation whose tongue thou shalt not understand;

50a nation of fierce countenance, which shall not regard the person of the old, nor shew favour to the young: