هِيَ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – هِيَ is a noun

A noun may either be 1) Definite or indefinite 2) Masculine or feminine 3) Singular, dual or plural 4) Nominative, accusative, genitive or fixed

هِيَ is an indeclinable personal pronoun of the third person, feminine, singular

Surah/Below are the 2+ verses in the holy Quran containing the third person, feminine, singular, detached pronounهِيَ
Verse
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97-5Peace it is until the emergence of Dawnسَلَامٌ هِيَ حَتَّى مَطْلَعِ الفَجْرِ
100-10and what will make you know what it is?وَمَآ أَدْرَاكَ مَا هِيَهْ