An Nur Ayah 30

قُل لِّلْمُؤْمِنِينَ يَغُضُّواْ مِنْ أَبْصَـٰرِهِمْ وَيَحْفَظُواْ فُرُوجَهُمْ‌ۚ ذَٲلِكَ أَزْكَىٰ لَهُمْ‌ۗ إِنَّ ٱللَّهَ خَبِيرُۢ بِمَا يَصْنَعُونَ ٣٠ ?O Prophet!? Tell the believing men to lower their gaze and guard their chastity. That is purer for them. Surely Allah is All-Aware of what they do.