‘Abd Allaah (bin Masud) said “I asked Apostle of Allaah ﷺ which sin is the gravest?” He replied “That you associate someone with Allaah, while He has created you”. I again asked “Which then?” He replied “That you commit adultery with the wife of your neighbor.” Allaah then revealed the following Qur’anic verse in support of the statement of the Prophet ﷺ “Those who invoke not with Allaah any other god nor slay such life as Allaah has made sacred except for just cause nor commit fornication.”  

قُلْتُ يَا رَسُولَ اللَّهِ أَىُّ الذَّنْبِ أَعْظَمُ قَالَ أَنْ تَجْعَلَ لِلَّهِ نِدًّا وَهُوَ خَلَقَكَ قَالَ فَقُلْتُ ثُمَّ أَىٌّ قَالَ أَنْ تَقْتُلَ وَلَدَكَ مَخَافَةَ أَنْ يَأْكُلَ مَعَكَ قَالَ قُلْتُ ثُمَّ أَىٌّ قَالَ أَنْ تُزَانِيَ حَلِيلَةَ جَارِكَ قَالَ وَأَنْزَلَ اللَّهُ تَعَالَى تَصْدِيقَ قَوْلِ النَّبِيِّ ﷺ { وَالَّذِينَ لاَ يَدْعُونَ مَعَ اللَّهِ إِلَهًا آخَرَ وَلاَ يَقْتُلُونَ النَّفْسَ الَّتِي حَرَّمَ اللَّهُ إِلاَّ بِالْحَقِّ وَلاَ يَزْنُونَ } الآيَةَ  

Musaykah, a slave-girl of some Ansari, came and said: My master forces me to commit fornication. Thereupon the following verse was revealed: "But force not your maids to prostitution (when they desire chastity)."  

إِنَّ سَيِّدِي يُكْرِهُنِي عَلَى الْبِغَاءِ فَنَزَلَ فِي ذَلِكَ { وَلاَ تُكْرِهُوا فَتَيَاتِكُمْ عَلَى الْبِغَاءِ }  

Mu’tamir reported on the authority of his father Sa’id bin Al Hassan explain the Qur’anic verse “But if anyone compels them, yet after such compulsion is Allaah oft-forgiving most merciful(to them), said Allaah is oft-forgiving to those (slave girls) who were compelled (to prostitution)  

عَنْ أَبِيهِ { وَمَنْ يُكْرِهْهُنَّ فَإِنَّ اللَّهَ مِنْ بَعْدِ إِكْرَاهِهِنَّ غَفُورٌ رَحِيمٌ } قَالَ قَالَ سَعِيدُ بْنُ أَبِي الْحَسَنِ غَفُورٌ لَهُنَّ الْمُكْرَهَاتِ