ישעיהו מו:ב פירוש: רש״י ואבן עזרא

they could not deliver the burden to discharge the feces in their bowels as others discharge, in the normal manner.

They bow down. The beasts that carry the idols, bow down.

deliver Heb. מַלֵּט, an expression of discharging from an embedded place. Comp. (supra 34:15) “There, the owl has made its nest, and she has laid eggs (וַתְּמַלֵט),” he has discharged her egg. Comp. also (infra 66:7) “And she has been delivered (וְהִמְלִיטָה) of a male child.” Jonathan, however, did not render these verses in this manner.