Deuteronomy 28:33-34, 65

A people whom you do not know shall eat up the produce of your ground and all your labors, and you will never be anything but oppressed and crushed continually. You shall be driven mad by the sight of what you see.

Among those nations you shall find no rest, and there will be no resting place for the sole of your foot; but there the LORD will give you a trembling heart, failing of eyes, and despair of soul.