Job 9:5

5 Who removeth mountains without their knowing, That He hath overturned them in His wrath; 6 Who causeth the earth to shake out of its place, And its pillars to tremble; 7 Who commandeth the sun, and it riseth not, And sealeth up the stars. ידעוּ ולא (Job 9:5) may also be translated: without one's perceiving it or knowing why; but it is more natural to take the mountains as the subject. אשׁר, quod, that (not "as," Ewald, 333, a), after ידע, as Eze 20:26; Ecc 8:12. Even the lofty mountains are quite unconscious of the change which He effects on them in a moment. Before they are aware that it is being done, it is over, as the praet. implies; the destructive power of His anger is irresistible, and effects its purpose suddenly. He causes the earth to start up from its place (comp. Isa 13:13) which it occupies in space (Job 26:7); and by being thus set in motion by Him, its pillars tremble, i.e., its internal foundations (Psa 104:5), which are removed from human perception (Job 38:6). It is not the highest mountains, which are rather called the pillars, as it were the supports, of heaven (Job 26:11), that are meant. By the same almighty will He disposes of the sun and stars. The sun is here called חרס (as in Jdg 14:18 חרסה with unaccented ah, and as Isa 19:18 ‛Ir ha-Heres is a play upon החרס עיר, Ἡλιούπολις), perhaps from the same root as חרוּץ, one of the poetical names of gold. At His command the sun rises not, and He seals up the stars, i.e., conceals them behind thick clouds, so that the day becomes dark, and the night is not made bright. One may with Schultens think of the Flood, or with Warburton of the Egyptian darkness, and the standing still of the sun at the word of Joshua; but these are only single historical instances of a fact here affirmed as a universal expe…

In this and the following chapter we have Job's answer to Bildad's discourse, wherein he speaks honourably of God, humbly of himself, and feelingly of his troubles; but not one word by way of reflection upon his friends, or their unkindness to him, nor in direct reply to what Bildad had said. He wisely keeps to the merits of the cause, and makes no remarks upon the person that managed it, nor seeks occasion against him. In this chapter we have, I. The doctrine of God's justice laid down (Job 9:2). II. The proof of it, from his wisdom, and power, and sovereign dominion (Job 9:3-13). III. The application of it, in which, 1. He condemns himself, as not able to contend with God either in law or battle (Job 9:14-21). 2. He maintains his point, that we cannot judge of men's character by their outward condition (Job 9:22-24). 3. He complains of the greatness of his troubles, the confusion he was in, and the loss he was at what to say or do (Job 9:25-35).

9:5-6 When God moves the mountains and when the foundations of the earth tremble, it is a sign of his presence as lawgiver (Exod 19:18), judge (Jer 4:24), or rescuer (Ps 18:7; Isa 13:13; 29:6).