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:21:34 –

And We did not grant to any man before you eternity ˹on earth˺; so if you die - would they be eternal?  

When the disbelievers said that Muhammad (s) would die, the following was revealed: And We did not assign to any human being before you immortality, permanence ˹of life˺ in this world. What, if you ˹are fated to˺ die, will they be immortal?, in it? No! (The last sentence constitutes the ˹syntactical˺ locus of the interrogative of denial).
القرآن:٢١:٣٤ –

وَمَا جَعَلْنَا لِبَشَرٍ مِنْ قَبْلِكَ الْخُلْدَ ۖ أَفَإِنْ مِتَّ فَهُمُ الْخَالِدُونَ  

ونزل لما قال الكفار إنَّ محمداً سيموت: {وما جعلنا لبشر من قبلك الخلد} البقاء في الدنيا {أفإن مت فهم الخالدون} فيها؟ لا، فالجملة الأخيرة محل الاستفهام الإنكاري.