לֶ֣חֶם יוּדָ֔ק כִּ֛י לֹ֥א לָנֶ֖צַח אָד֣וֹשׁ יְדוּשֶׁ֑נּוּ וְ֠הָמַם גִּלְגַּ֧ל עֶגְלָת֛וֹ וּפָרָשָׁ֖יו לֹֽא־יְדֻקֶּֽנּוּ׃
Is bread corn crushed? Nay, he will not ever be threshing it; And though the roller of his wagon and its sharp edges move noisily, He doth not crush it.
Rashi on Isaiah
Bread grain is crushed And whom (sic) do they crush with harsh implements? The bread of grain (sic), because it is not easily beaten.
Ibn Ezra on Isaiah
Bread corn is bruised. It is customary for bread corn to be bruised.
Rashi on Isaiah
but it is not threshed forever This כִּי is used in the sense of ‘but.’ But they do not crush it forever, [because they will not crush the seed kernels forever for them to be threshed to be crushed through the threshing-board and the wagon wheel].