[Machine] The Mother of the Believers once visited her father. It was her day when the Prophet ﷺ came and did not see her in the house. So he sent for his concubine Maria the Copt and had intercourse with her in Hafsa's house. When Hafsa came to know about this, she said, "O Messenger of Allah, do you do this in my house and on my day?" He said, "Verily, it is forbidden for me to betray her and inform anyone about it." Hafsa then went to Aisha and informed her about it. Allah then revealed in His Book, "O Prophet, why do you forbid [yourself from] what Allah has made lawful for you?" (Quran 66:1) until His saying, "And [you are to] repent to Allah, [all of you], O believers," (Quran 66:4). It was commanded that he should beg pardon of Allah and declare his obedience to Him, and turn towards his wives, and with that meaning Al-Hasan also recited this Verse as a message.  

أُمَّ الْمُؤْمِنِينَ ؓ زَارَتْ أَبَاهَا ذَاتَ يَوْمٍ وَكَانَ يَوْمُهَا فَلَمَّا جَاءَ النَّبِيُّ ﷺ فَلَمْ يَرَهَا فِي الْمَنْزِلِ فَأَرْسَلَ إِلَى أَمَتِهِ مَارِيَةَ الْقِبْطِيَّةِ فَأَصَابَ مِنْهَا فِي بَيْتِ حَفْصَةَ فَجَاءَتْ حَفْصَةُ عَلَى تِلْكَ الْحَالَةِ فَقَالَتْ يَا رَسُولَ اللهِ أَتَفْعَلُ هَذَا فِي بَيْتِي وَفِي يَوْمِي؟ قَالَ فَإِنَّهَا عَلَيَّ حَرَامٌ لَا تُخْبِرِي بِذَلِكَ أَحَدًا فَانْطَلَقَتْ حَفْصَةُ إِلَى عَائِشَةَ فَأَخْبَرَتْهَا بِذَلِكَ فَأَنْزَلَ اللهُ ﷻ فِي كِتَابِهِ {يَا أَيُّهَا النَّبِيُّ لِمَ تُحَرِّمُ مَا أَحَلَّ اللهُ لَكَ} [التحريم 1] إِلَى قَوْلِهِ {وَصَالِحِ الْمُؤْمِنِينَ} [التحريم 4] فَأُمِرَ أَنْ يُكَفِّرَ عَنْ يَمِينِهِ وَيُرَاجِعَ أَمَتَهُ وَبِمَعْنَاهُ ذَكَرَهُ الْحَسَنُ الْبَصْرِيُّ مُرْسَلًا