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:69:15 –

Then on that Day, the Resurrection will occur,  

then, on that day, the ˹imminent˺ Event will come to pass, the Resurrection will take place,
القرآن:٦٩:١٥ –

فَيَوْمَئِذٍ وَقَعَتِ الْوَاقِعَةُ  

{فيومئذ وقعت الواقعة} قامت القيامة.

See similar narrations below:

Collected by Qurʾān
quran:56:1 – In the name of Allah, the Entirely Merciful, the Especially Merciful.

When the Occurrence occurs,  

When the ˹imminent˺ Event comes to pass, ˹when˺ the Resurrection takes place,
القرآن:٥٦:١ – بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ

إِذَا وَقَعَتِ الْوَاقِعَةُ  

{إذا وقعت الواقعة} قامت القيامة.