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:79:7 –

There will follow it the subsequent ˹one˺.  

and is followed by the Aftershock, the second blast; between the two ˹blasts˺ is a span of forty years (the sentence ˹tatba‘uhā’l-rādifatu˺ is a circumstantial qualifier referring to al-rājifa, ‘the Tremor’, in other words, the ‘day’ can ˹adverbially˺ accommodate both blasts and other events, and so for this reason it can also properly function as the adverbial qualifier for the Resurrection that will take place after the second ˹blast˺);
القرآن:٧٩:٧ –

تَتْبَعُهَا الرَّادِفَةُ  

{تتبعها الرادفة} النفخة الثانية وبينهما أربعون سنة، والجملة حال من الراجفة، فاليوم واسع للنفختين وغيرهما فصح ظرفيته للبعث الواقع عقب الثانية.