وَلَا تَقْرَبُوا الزِّنَا ۖ إِنَّهُ كَانَ فَاحِشَةً وَسَاءَ سَبِيلًا

This verse prohibits not just the act of adultery or fornication, but even approaching or coming near to it. This includes avoiding situations, relationships, media, or behaviors that might lead to sexual immorality. The verse characterizes such behavior as both immoral and harmful to one's life path. This teaching protects the sanctity of marriage, family structure, and the dignity of intimate relationships by establishing clear boundaries.