Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:37:19 –

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

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.
القرآن:٣٧:١٩ –

فَإِنَّمَا هِيَ زَجْرَةٌ وَاحِدَةٌ فَإِذَا هُمْ يَنْظُرُونَ  

{فإنما هي} ضمير مبهم يفسره {زجرة} أي صيحة {واحدة فإذا هم} أي الخلائق أحياء {ينظرون} ما يفعل بهم.

See similar narrations below:

Collected by Qurʾān
quran:79:13 –

Indeed, it will be but one shout,  

God, exalted be He, says: But it, the Aftershock, which will be followed by the Resurrection, will be only a single blast, and so when it is blasted:
القرآن:٧٩:١٣ –

فَإِنَّمَا هِيَ زَجْرَةٌ وَاحِدَةٌ  

{فإنما هي} أي الرادفة التي يعقبها البعث {زجرة} نفخة {واحدة} فإذا نفخت.