Surah As-Saffat 37:19

Those who set the Ranks · Verse 19 of 182 · Juz 23 · Page 446

فَإِنَّمَا هِىَ زَجْرَةٌ وَٰحِدَةٌ فَإِذَا هُمْ يَنظُرُونَ

It will be only one shout, and at once they will be observing.

Translation: Saheeh International

Tafsir

For it will be only innamā hiya this hiya is a demonstrative pronoun explained by the following zajratun a single cry and lo! they all creatures will be alive watching to see what will be done with them.

Excerpt from Tafsir al-Jalalayn, commentary on 37:19, via Quran.com. The reader has the full commentary and 9 more tafsirs.