Deuteronomy 28:33-34, 65

A nation whom you have not known shall eat the fruit of your land and the produce of your labor, and you shall be only oppressed and crushed continually. So you shall be driven mad because of the sight which your eyes see.

And among those nations you shall find no rest, nor shall the sole of your foot have a resting place; but there the LORD will give you a trembling heart, failing eyes, and anguish of soul.