وَٱلَّيْلِ وَمَا وَسَقَ
Sentence structure
وَٱلَّيْلِ is coordinated with the preceding oath phrase. In وَمَا, the relative مَا is likewise in the genitive position; وَسَقَ is its relative clause with an understood subject and an omitted returning object.
Ayah summary
An oath is sworn by the night and all that it gathers together.
وَٱلَّيْلِ — And the night
Grammar: وَ coordinates with the preceding oath phrase, ٱل is the definite article, and لَّيْلِ is a genitive coordinated noun.
وَمَا — and what
Grammar: وَ coordinates; relative مَا is in the genitive position because it is coordinated with ٱلَّيْلِ.
وَسَقَ — it envelops
Grammar: A third-person masculine-singular perfect forming the relative clause, with an understood subject and an omitted returning object pronoun.