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:76:19 –

There will circulate among them young boys made eternal. When you see them, you would think them ˹as beautiful as˺ scattered pearls.  

And they will be waited upon by immortal youths, ˹immortally˺ in the form of youths, never ageing, whom, when you see them you will suppose them, because of their beauty and the way in which they are scattered about ˹offering˺ service, to be scattered pearls, ˹strewn˺ from their string, or from their shells, in which they are fairer than ˹when they, the pearls, are˺ otherwise ˹not in their shells˺.
القرآن:٧٦:١٩ –

وَيَطُوفُ عَلَيْهِمْ وِلْدَانٌ مُخَلَّدُونَ إِذَا رَأَيْتَهُمْ حَسِبْتَهُمْ لُؤْلُؤًا مَنْثُورًا  

{ويطوف عليهم ولدان مخلدون} بصفة الولدان لا يشيبون {إذا رأيتهم حسبتهم} لحسنهم وانتشارهم في الخدمة {لؤلؤا منثورا} من سلكه أو من صدفه وهو أحسن منه في غير ذلك.