Deuteronomy 28:33-34, 65

A nation that you have not known shall eat up the fruit of your ground and of all your labors, and you shall be only oppressed and crushed continually, so that you are driven mad by the sights that your eyes see.

And among these nations you shall find no respite, and there shall be no resting place for the sole of your foot, but the LORD will give you there a trembling heart and failing eyes and a languishing soul.