Sura al-Nisāʾ 4:15

وَٱلَّٰتِى يَأْتِينَ ٱلْفَٰحِشَةَ مِن نِّسَآئِكُمْ فَٱسْتَشْهِدُوا۟ عَلَيْهِنَّ أَرْبَعَةً مِّنكُمْ فَإِن شَهِدُوا۟ فَأَمْسِكُوهُنَّ فِى ٱلْبُيُوتِ حَتَّىٰ يَتَوَفَّىٰهُنَّ ٱلْمَوْتُ أَوْ يَجْعَلَ ٱللَّـهُ لَهُنَّ سَبِيلًا

wa-allātī yaʾtīna l-fāḥishata min nasāʾikum fa-istashhidū ʿalayhinna arbaʿatan minkum fa-in shahidū fa-amsikūhunna fī l-buyūti ḥattā yatawaffahunna l-mawtu aw yajʿala allāhu la-hunna sabīlan

If any of your women are guilty of lewdness, Take the evidence of four (Reliable) witnesses from amongst you against them; and if they testify, confine them to houses until death do claim them, or Allah ordain for them some (other) way.