Verse 4

وَٱلَّذِينَ يَرْمُونَ ٱلْمُحْصَنَـٰتِ ثُمَّ لَمْ يَأْتُوا۟ بِأَرْبَعَةِ شُهَدَآءَ فَٱجْلِدُوهُمْ ثَمَـٰنِينَ جَلْدَةً وَلَا تَقْبَلُوا۟ لَهُمْ شَهَـٰدَةً أَبَدًا وَأُو۟لَـٰٓئِكَ هُمُ ٱلْفَـٰسِقُونَ

As for those who accuse virtuous women then do not produce four witnesses, you shall thereafter give them eighty lashes and never accept testimony from them. And these are the wicked ones.