'Tail' in the Bible

And the LORD shall make thee the head, and not the tail; and thou shalt be above only, and thou shalt not be beneath; if that thou hearken unto the commandments of the LORD thy God, which I command thee this day, to observe and to do them:

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