Surah Al-Ahzab — Ayah 30 (33:30)
يَٰنِسَآءَ ٱلنَّبِيِّ مَن يَأۡتِ مِنكُنَّ بِفَٰحِشَةٖ مُّبَيِّنَةٖ يُضَٰعَفۡ لَهَا ٱلۡعَذَابُ ضِعۡفَيۡنِۚ وَكَانَ ذَٰلِكَ عَلَى ٱللَّهِ يَسِيرٗا ٣٠
English translation (Saheeh International)
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.
Brief commentary
O wives of the Prophet, whoever amongst you comes with an open sin, her punishment will be doubled on the Day of Judgment, due to her status and rank, and to protect the personage of the Prophet (peace be upon him). And this doubling is easy for Allah.