ישעיהו כח:כ פירוש: רש״י ואבן עזרא

For the bed is too short for one to stretch When I bring the enemy upon you, he shall press you so that you will not be able to supply his work. When he spreads out his bed upon you, it will be too short for the one who lies on it to stretch.

המצע The mattress,²⁹A. V., The bed. which is underneath in the bed.

to stretch (מֵהִשְׂתָּרֵעַ) to lengthen one’s limbs, estandejlejjr in O.F.