ٱلشَّمْس : ٤

  • وَٱلَّيۡلِ And the night
  • إِذَا when
  • يَغۡشَىٰهَا it covers it
And [by] the night when it covers [i.e., conceals] it
and [by] the night when it enshrouds her, covering her up with its darkness (idhaa, 'when', in all three instances is an absolute adverbial, operated by the verbal action of the oath).