52:24 And they will be waited upon by [immortal] youths,* [as if they were children] of their own,* [as pure] as if they were pearls hidden in their shells.
Muhammad Asad (The Message Of Quran)
Dictionaries
Ejtaal Arabic Almanac: Lane's Lexicon, Hans Wehr, Lisan al-Arab and others
And [did We not say,] when We caused Mount Sinai to quake above the children of Israel* as though it were a [mere] shadow, and they thought that it would fall upon them, "Hold fast with [all your] strength unto what We have vouchsafed you, and bear in mind all that is therein, so that you might remain conscious of God"?*