Deuteronomy 28:44-46

44He shall lend to thee, but thou shalt not lend to him: he shall be the head, and thou shalt be the tail.

45And all these curses shall come upon thee, and shall pursue thee, and overtake thee, until thou be destroyed; because thou hearkenedst not unto the voice of Jehovah thy 1God, to keep his commandments and his statutes which he commanded thee.

46And they shall be upon thee for a sign and for a wonder, and upon thy seed for ever.