And young attendants like pearls within their shells, will go round.
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Tafseer
'Abdullāh Ibn 'Abbās / Muḥammad al-Fīrūzabādī
تفسير : (and there go round) to serve them, (waiting on them menservants of their own), in their limpidity they (as they were hidden pearls) hidden from heat and cold.
Jalāl al-Dīn al-Maḥallī
تفسير : 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.