Let the stars of the twilight thereof be dark; let it look for light, but have none; neither let it see the dawning of the day:

Let the stars be darkened with the mist thereof: let it expect light and not see it, nor the rising of the dawning of the day:

Let the stars of its twilight be dark; let it wait for light, and have none, neither let it see the eyelids of the dawn:

Let its morning stars be dark; let it be looking for light, but may it not have any; let it not see the eyes of the dawn.

Let the stars be concealed with its darkness. Let it expect light, and not see it, nor the rising of the dawn in the East.

Let the stars of the twilight thereof be dark - That is, be extinguished, so that it shall be total darkness - darkness not even relieved by a single star. The word here rendered "twilight" נשׁף nesheph means properly a breathing; and hence, the evening, when cooling breezes "blow," or gently breathe. It is used however, to denote both the morning and the evening twilight, though here probably it means the latter. He wishes that the evening of that night, instead of being in any way illuminated, should "set in" with total darkness and continue so. The Septuagint renders it, "night.
Let it look for light, but have none - Personifying the night, and representing it as looking out anxiously for some ray of light. This is a beautiful poetic image - the image of "Night," dark and gloomy and sad, anxiously looking out for a single beam or a star to break in upon its darkness and diminish its gloom.
Neither let it see the dawning of the day - Margin, more literally and more beautifully, "eyelids of the morning." The word rendered "dawning" עפעפים ‛aph‛aphı̂ym means properly "the eyelashes" (from עוּף ‛ûph "to fly"), and it is given to them from their flying or fluttering. The word rendered "day" שׁחר shachar means the aurora, the morning. The sun when he is above the horizon is called by the poets the eye of day; and hence, his earliest beams, before he is risen, are called the eyelids or eyelashes of the morning opening upon the world. This figure is common in the ancient Classics, and occurs frequently in the Arabic poets; see Schultens "in loc." Thus, in Soph. Antiq. 104, the phrase occurs, Ἁμέρας βλέφυρον Hameras blefaron. So in Milton's Lycidas,
" - Ere the high lawns appeared
Under the opening eyelids of the dawn,
We drive afield."
Job's wish was, that there might be no star in the evening twilight, and that no ray might illuminate that of the morning; that it might be enveloped in perpetual, unbroken darkness.

Let the stars of the twilight thereof - The stars of the twilight may here refer to the planets Venus, Jupiter, Mars, and Mercury, as well as to the brighter fixed stars.
Let it look for light - Here the prosopopoeia or personification is still carried on. The darkness is represented as waiting for the lustre of the evening star, but is disappointed; and these for the aurora or dawn, but equally in vain. He had prayed that its light, the sun, should not shine upon it, Job 3:4; and here he prays that its evening star may be totally obscured, and that it might never see the dawning of the day. Thus his execration comprehends every thing that might irradiate or enliven it.

Let the stars of the twilight thereof be dark; let it look for light, but [have] none; neither let it (g) see the dawning of the day:
(g) Let it be always night, and never see day.

Let the stars of the twilight thereof be dark,.... Either of the morning or evening twilight; both may be meant, rather the latter, because of the following clause; the sense is, let not these appear to adorn the heavens, and to relieve the darkness of the night, and make it more pleasant and delightful, as well as to be useful to travellers and sailors:
let it look for light, but have none; that is, either for the light of the moon and stars, to shine in the night till daybreak, or for the light of the sun at the time when it arises; but let it have neither; let the whole time, from sun setting to sunrising, from one twilight to another, be one continued gross and horrible darkness; here, by a strong and beautiful figure, looking is ascribed to the night:
neither let it see the dawning of the day; or, "let it not see the eyelids of the morning" (l), or what we call "peep of day"; here, in very elegant language, the dawn of morning light is expressed, which is like the opening of an eye and its lids, quick and vibrating, when light is let in and perceived; or this may be interpreted of the sun, the eye of the morning and of light, and of its rays, which, when first darted, are like the opening of the eyelids.
(l) "palpebras aurorae", Montanus, Mercerus, &c.

dawning of the day--literally, "eyelashes of morning." The Arab poets call the sun the eye of day. His early rays, therefore, breaking forth before sunrise, are the opening eyelids or eyelashes of morning.

The stars - Let the stars, which are the glory and beauty of the night, be covered with thick darkness, and that both in the evening twilight, when the stars begin to shine; and also in the farther progress of the night, even 'till the morning dawns. Look - Let its darkness be aggravated with the disappointment of its expectations of light. He ascribes sense or reasoning to the night, by a poetical fiction, usual in all writers. Dawning - Hebrews. the eye - lids of the day, the morning - star which ushers in the day, and the beginning, and progress of the morning light, let this whole natural day, consisting of night and day, be blotted out of the catalogue of days.