ישעיהו לז:כז פירוש: רש״י

And their inhabitants became short of strength (lit. short of hand.) I weakened the strength before you.

and stubble before [becoming] standing grain (וּשְׁדֵמָה) That is what is called ‘estoble’ in O.F., stubble, what remains in the ground, the roots of the harvest.

before [becoming] standing grain When it has not yet reached the time to ripen and harden, to become standing grain, and it is weak and tender.