Deuteronomy 28:47-50

47“Because you did not serve the Lord your God with a heart full of joy and gladness for the abundance of all things [with which He blessed you],

48you will therefore serve your enemies whom the Lord sends against you, in hunger and in thirst, in nakedness and in lack of all things; and He will put an iron yoke [of slavery] on your neck until He has destroyed you.

49“The Lord will bring a nation against you from far away, from the end of the earth, [as swift] as the eagle swoops down [to attack], a nation whose language you will not understand,

50a defiant nation who will have no respect for the old, nor show favor to the young,