Surah An-Nur 24:4
وَٱلَّذِينَ يَرْمُونَ ٱلْمُحْصَنَٰتِ ثُمَّ لَمْ يَأْتُوا۟ بِأَرْبَعَةِ شُهَدَآءَ فَٱجْلِدُوهُمْ ثَمَٰنِينَ جَلْدَةً وَلَا تَقْبَلُوا۟ لَهُمْ شَهَٰدَةً أَبَدًا ۚ وَأُو۟لَٰٓئِكَ هُمُ ٱلْفَٰسِقُونَ ٤
EnglishSahih International
And those who accuse chaste women and then do not produce four witnesses - lash them with eighty lashes and do not accept from them testimony ever after. And those are the defiantly disobedient,