이사야 28:24의 주석

all day This is the interrogative. Therefore, it is voweled with a hataf pattah.

Doth the plowman, etc. The plowman tills the ground once and twice, and sows, then the earth by its natural power brings forth the increase.

shall...plow One who plows to sow - does the one who plows to sow plow forever? If so, what does he accomplish? Similarly, the prophets admonish you to bring you back to do good deeds. Shall they admonish forever and not accomplish?

יפתח He opens, וישדד and he breaks the clods, that is, he prepares the field; comp. Hos. 10:11. יפתח and וישדד are a repetition of the same idea in different words.

Shall he open and harrow his soil? Shall he never sow but always open the soil with plowshares and plowing implements? יְשַׂדֵּד is an expression of work of the field. Shall he open and harrow? First he makes wide furrows and later he makes small furrows. This we learned in the Midrash of Rabbi Tanhuma.