Surah Al-Mu'minun 23:5

وَٱلَّذِينَ هُمْ لِفُرُوجِهِمْ حَـٰفِظُونَ

And they who guard their private parts

Translation: Saheeh International

Tafsir

and who guard their private parts against what is unlawful

Excerpt from Tafsir al-Jalalayn, commentary on 23:5, via Quran.com. The reader has the full commentary and 9 more tafsirs.