Quran 23:5 from Surah Al-Muminoon on Divine Marvels.
وَٱلَّذِينَ هُمۡ لِفُرُوجِهِمۡ حَٰفِظُونَ
English translation: And those who [they] of their modesty (are) guardians
Transliteration: wa-alladhina hum lifurujihim hafizuna