Job 5:25

“Thou shalt know also that thy seed [shall be] great, etc.] Not his seed sown in the earth, and the increase of that, but his children, as the next clause explains it, as Bar Tzemach well observes; and designs either their greatness in worldly things, in wealth and riches, in honour and dignity, in power and authority, or else their numbers; for the word may be rendered “much” or “many” f227, a multitude of children being reckoned a great temporal blessing; but this seems rather intended in the following words: and thine offspring as the grass of the earth; as numerous as the spires of grass, which can no more be told than the stars of the heavens, or the sand of the sea, by which the same…”

“as the grass-- (Psa 72:16). Properly, "herb-bearing seed" (Gen 1:11-12).”

“Thou shalt know also that thy seed shall be great - Margin, “much.” That is, thy posterity shall be numerous. This was one of the blessings supposed to be connected with the favor of God; see the notes at Isaiah 53:10. And thine offspring as the grass of the earth - On the meaning of the word here rendered offspring, see the notes at Isaiah 48:19. Nothing is more common in the Scriptures, than to compare a prosperous and a happy man to a green and flourishing tree; see Psalms 1:3; Psalms 92:12-14. The idea here is, that the righteous would have a numerous and a happy posterity, and that the divine favor to them would bc shown by the blessing of God on their children; compare Psalms 128:1,…”

“Know - By assurance from God's promises, and the impressions of his Spirit; and by experience in due time. Job 5:26”

“5:25 descendants . . . as plentiful as grass: See Gen 22:17; Lev 26:9; Deut 28:4, 11-12.”

“thy seed: Job 42:13-16; Gen 15:5; Lev 26:9; Deu 28:4; Psa 112:2, Psa 127:3-5, Psa 128:3-6 great: or, much. as the grass: Psa 72:16 Job 5:26”