Surah As-Saffat 37:48
وَعِندَهُمْ قَـٰصِرَٰتُ ٱلطَّرْفِ عِينٌ
And with them will be women limiting [their] glances, with large, [beautiful] eyes,
Translation: Saheeh International
Tafsir
and with them will be maidens of restrained glances who reserved their glances exclusively for their spouses and do not look upon any other — because of the beauty they the maidens see in them — with beautiful eyes ‘īn means with large and beautiful eyes
Excerpt from Tafsir al-Jalalayn, commentary on 37:48, via Quran.com. The reader has the full commentary and 9 more tafsirs.