سَلَـٰمٌ هِىَ حَتَّىٰ مَطْلَعِ ٱلْفَجْرِ ٥
Sentence structure
هِىَ is a feminine-singular subject and سَلَـٰمٌ its fronted nominative predicate. حَتَّىٰ مَطْلَعِ ٱلْفَجْرِ is the limiting genitive phrase.
Ayah summary
This night is peace until the break of dawn.
سَلَـٰمٌ — Peace
Grammar: An indefinite masculine nominative fronted predicate of هِىَ.
هِىَ — it is
Grammar: A third-person feminine-singular detached pronoun functioning as subject.
حَتَّىٰ — until
Grammar: A preposition marking the endpoint and governing the following genitive noun. This phrase is linked across the ayah boundary to «تَنَزَّلُ».
مَطْلَعِ — the emergence
Grammar: A masculine genitive noun after حَتَّىٰ, annexed onward.
ٱلْفَجْرِ — of dawn
Grammar: A defined masculine genitive complement of مَطْلَعِ.