Quran 24:30 from Surah An-Noor on Divine Marvels.
قُل لِّلۡمُؤۡمِنِينَ يَغُضُّواْ مِنۡ أَبۡصَٰرِهِمۡ وَيَحۡفَظُواْ فُرُوجَهُمۡۚ ذَٰلِكَ أَزۡكَىٰ لَهُمۡۚ إِنَّ ٱللَّهَ خَبِيرُۢ بِمَا يَصۡنَعُونَ
English translation: Say to the believing men they should lower their gaze their gaze and they should guard their chastity That (is) purer for them Indeed Allah (is) All-Aware of what they do
Transliteration: qul lil'mu'minina yaghuddu min absarihim wayahfazu furujahum dhalika azka lahum inna al-laha khabirun bima yasna'una