Deuteronomy 28:47-50

47Because thou didst not serve the LORD thy God with joyfulness, and with gladness of heart, for the abundance of all things ; 48Therefore shalt thou serve thy enemies which the LORD shall send against thee, in hunger, and in thirst, and in nakedness, and in lack of all things : and he shall put a yoke of iron upon thy neck, until he hath destroyed thee. 49The LORD shall bring a nation against thee from far, from the end of the earth, as swift as the eagle flieth; a nation whose language thou shalt not understand;1 50A nation of fierce countenance, which shall not regard the person of the old, nor show favour to the young:2