Surah An-Nur

إِنَّ الَّذِينَ يُحِبُّونَ أَنْ تَشِيعَ الْفَاحِشَةُ فِي الَّذِينَ آمَنُوا لَهُمْ عَذَابٌ أَلِيمٌ فِي الدُّنْيَا وَالْآخِرَةِ ۚ وَاللَّهُ يَعْلَمُ وَأَنْتُمْ لَا تَعْلَمُونَ
Indeed, those who like that immorality should be spread [or publicized] among those who have believed will have a painful punishment in this world and the Hereafter. And Allah knows and you do not know.

Surah An-Nur (24:19)

If you read tafsir this verse was a warning to those who slandered Aisha RA. But as we know fahisha isn't only slander but also fornication and other types of immorality. So what about those who send explicit images to their friends or support their own brothers to commit fahisha. We should stay away from these things, and if you happen to fall into sin keep it to yourself and repent from it. As Allah kept your sin hidden but here you are exposing yourself.