قُل لِلمُؤمِنينَ يَغُضّوا مِن أَبصارِهِم وَيَحفَظوا فُروجَهُم ۚ ذٰلِكَ أَزكىٰ لَهُم ۗ إِنَّ اللَّهَ خَبيرٌ بِما يَصنَعونَ

Tell the believing men to reduce [some] of their vision and guard their private parts. That is purer for them. Indeed, Allah is Acquainted with what they do.