'Well fenced' in the Bible

This people shall eat up thy fruit and thy meat; yea, they shall devour thy sons and thy daughters, thy sheep and thy bullocks. They shall eat up thy grapes and figs. As for thy strong and well-fenced cities, wherein thou didst trust, they shall destroy them with the sword.

And the king of the north shall come, and cast up a mound, and take the well-fenced city; and the arms of the south shall not withstand, neither his chosen people, for there shall be no strength to withstand.