الجاثية — Al-Jasiyah Ayat 32
وَاِذَا قِيْلَ اِنَّ وَعْدَ اللّٰهِ حَقٌّ وَّالسَّاعَةُ لَا رَيْبَ فِيْهَا قُلْتُمْ مَّا نَدْرِيْ مَا السَّاعَةُۙ اِنْ نَّظُنُّ اِلَّا ظَنًّا وَّمَا نَحْنُ بِمُسْتَيْقِنِيْنَ
Wa iżā qīla inna wa‘dallāhi ḥaqquw was-sā‘atu lā raiba fīhā qultum mā nadrī mas-sā‘ah(tu), in naẓunnu illā ẓannaw wa mā naḥnu bimustaiqinīn(a).
"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.' ""