ישעיהו נד:ב פירוש: רש״י ואבן עזרא

and let them stretch forth far off.

Enlarge the place of thy tent, because of the larger number of thy children.

lengthen your cords These are thin ropes that hang at the bottom of tents, and that are tied to stakes called ‘chevills’ in French, which are thrust into the ground.