Deuteronomy 28:47-50

47Because you did not serve the LORD your God with joy and gladness of heart in all your abundance, 48you will serve your enemies the LORD will send against you in famine, thirst, nakedness, and destitution. He will place an iron yoke on your neck until He has destroyed you.

49The LORD will bring a nation from afar, from the ends of the earth, to swoop down upon you like an eagle—a nation whose language you will not understand, 50a ruthless nation with no respect for the old and no pity for the young.