Deuteronomy 28:47-48

47  a Because you did not serve the  Lord your God with joyfulness and gladness of heart, because of the abundance of all things, 48 therefore you shall serve your enemies whom the  Lord will send against you, in hunger and thirst, in nakedness, and lacking everything. And he b will put a yoke of iron on your neck until he has destroyed you.
Copyright information for ESV