Surah At-Tur 52:24

۞ وَيَطُوفُ عَلَيْهِمْ غِلْمَانٌ لَّهُمْ كَأَنَّهُمْ لُؤْلُؤٌ مَّكْنُونٌ

There will circulate among them [servant] boys [especially] for them, as if they were pearls well-protected.

Translation: Saheeh International

Tafsir

And there will circulate from all around them for service youths delicate in demeanour of their own as if in terms of their beauty and immaculateness they were hidden pearls preserved inside shells because when it a pearl is inside it it is better than one that is not.

Excerpt from Tafsir al-Jalalayn, commentary on 52:24, via Quran.com. The reader has the full commentary and 9 more tafsirs.