Surah Al-Isra — Ayah 32 (17:32)

English translation (Saheeh International)

And do not approach unlawful sexual intercourse.¹ Indeed, it is ever an immorality and is evil as a way.

1. - i.e., avoid all situations that might possibly lead to it.

Brief commentary

Be careful of fornication and avoid things that prompt it. It is extremely detestable and bad path to traverse as it leads to the mixing of lineages and punishment from Allah.