Surat Al-'Aĥzāb - سورة الأحزاب

يَا نِسَاءَ النَّبِيِّ مَن يَأْتِ مِنكُنَّ بِفَاحِشَةٍ مُّبَيِّنَةٍ يُضَاعَفْ لَهَا الْعَذَابُ ضِعْفَيْنِ ۚ وَكَانَ ذَٰلِكَ عَلَى اللَّهِ يَسِيرًا

Muhsin Khan: O wives of the Prophet! Whoever of you commits an open illegal sexual intercourse, the torment for her will be doubled, and that is ever easy for Allah.