Surah Al-Ahzab (The Enemy Alliance), Verse 30

یٰنِسَآءَ النَّبِیِّ مَنْ یَّاْتِ مِنْكُنَّ بِفَاحِشَةٍ مُّبَیِّنَةٍ یُّضٰعَفْ لَهَا الْعَذَابُ ضِعْفَیْنِ وَكَانَ ذٰلِكَ عَلَی اللّٰهِ یَسِیْرًا ۟

Yaa nisaaa'an Nabiyyi mai yaati minkunna bifaa hishatim mubaiyinatiny yudaa'af lahal 'azaabu di'fain wa kaana zaalika 'alal laahi yaseera

“O Consorts of the Prophet! If any of you were guilty of evident unseemly conduct, the Punishment would be doubled to her, and that is easy for Allah.”

Quran 33:30 (Yusuf Ali Translation)