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:25:11 –

But they have denied the Hour, and We have prepared for those who deny the Hour a Blaze.  

Nay, but they deny the ˹coming of the˺ Hour, the Resurrection, and We have prepared for those who deny the Hour a blaze (sa‘īr), a fire that has been set ablaze (musa‘‘ara), in other words, an intense ˹fire˺.
القرآن:٢٥:١١ –

بَلْ كَذَّبُوا بِالسَّاعَةِ ۖ وَأَعْتَدْنَا لِمَنْ كَذَّبَ بِالسَّاعَةِ سَعِيرًا  

{بل كذَّبوا بالساعة} القيامة {وأعتدنا لمن كذَّب بالساعة سعيرا} نارا مسعرة: أي مشتدة.