52:24
وَيَطُوفُ عَلَيْهِمْ غِلْمَانٌ لَّهُمْ كَأَنَّهُمْ لُؤْلُؤٌ مَّكْنُونٌ
Round about them will serve, (devoted) to them, young male servants (handsome) as Pearls well-guarded.
56:17
يَطُوفُ عَلَيْهِمْ وِلْدَانٌ مُّخَلَّدُونَ
Round about them will (serve) youths of perpetual (freshness),
76:19
وَيَطُوفُ عَلَيْهِمْ وِلْدَانٌ مُّخَلَّدُونَ إِذَا رَأَيْتَهُمْ حَسِبْتَهُمْ لُؤْلُؤاً مَّنثُوراً
And round about them will (serve) youths of perpetual (freshness): If thou seest them, thou wouldst think them scattered Pearls.