Let the stars of the twilight thereof be dark; i.e. "let not even the light of a star illuminate the morning or evening twilight of that night; let it be dark from beginning to end, uncheered even by the ray of a star."
Let it look for light, but have none. Again a personification. The night is regarded as consciously waiting in hope of the appearance of morning, but continually disappointed by the long lingering of the darkness.
And let it not see the dawning of the day; rather, as in the margin and in the Revised Version, let it not behold the eyelids of the morning (compare Milton's 'Lycidas,' "Under the opening eyelids of the morn," and Soph; 'Antigone,' χρυσσέης ἁμέρας βλέφαρον).