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:45:32 –

And when it was said, 'Indeed, the promise of Allah is truth and the Hour ˹is coming˺ - no doubt about it,' you said, 'We know not what is the Hour. We assume only assumption, and we are not convinced.' "  

And when it was said, to you, O disbelievers: “God’s promise, of resurrection, is indeed true, and there is no doubt about the Hour”, (read al-sā‘atu or al-sā‘ata) you said, “We do not know what the Hour is. We only make conjectures (al-Mubarrad said that this actually ˹means˺ in nahnu illā nazunnu zannan) and we are by no means certain” ’, that it will come to pass.
القرآن:٤٥:٣٢ –

وَإِذَا قِيلَ إِنَّ وَعْدَ اللَّهِ حَقٌّ وَالسَّاعَةُ لَا رَيْبَ فِيهَا قُلْتُمْ مَا نَدْرِي مَا السَّاعَةُ إِنْ نَظُنُّ إِلَّا ظَنًّا وَمَا نَحْنُ بِمُسْتَيْقِنِينَ  

{وإذا قيل} لكم أيها الكفار {إن وعد الله} بالبعث {حق والساعة} بالرفع والنصب {لا ريب} شك {فيها قلتم ما ندري ما الساعة إن} ما {نظن إلا ظنا} قال المبرد: أصله إن نحن إلا نظن ظنا {وما نحن بمستيقنين} أنها آتية.