Surah Al-Ahzab, Verse 30

يَٰنِسَآءَ ٱلنَّبِيِّ مَن يَأۡتِ مِنكُنَّ بِفَٰحِشَةٖ مُّبَيِّنَةٖ يُضَٰعَفۡ لَهَا ٱلۡعَذَابُ ضِعۡفَيۡنِۚ وَكَانَ ذَٰلِكَ عَلَى ٱللَّهِ يَسِيرٗا٣٠

yānisāa l-nabiyi man yati minkunna bifāḥishatin mubayyinatin yuḍāʿaf lahā l-ʿadhābu ḍiʿ'fayni wakāna dhālika ʿalā l-lahi yasīran

O wives of the Prophet, whoever of you should commit a clear immorality - for her the punishment would be doubled two fold, and ever is that, for Allāh, easy.