اَلنُّشُوزُ قَدْ يَكُونُ مِنَ اَلرَّجُلِ وَ اَلْمَرْأَةِ جَمِيعاً فَأَمَّا اَلَّذِي مِنَ اَلرَّجُلِ فَهُوَ مَا قَالَ اَللَّهُ عَزَّ وَ جَلَّ فِي كِتَابِهِ وَ إِنِ اِمْرَأَةٌ خٰافَتْ مِنْ بَعْلِهٰا نُشُوزاً أَوْ إِعْرٰاضاً فَلاٰ جُنٰاحَ عَلَيْهِمٰا أَنْ يُصْلِحٰا بَيْنَهُمٰا صُلْحاً وَ اَلصُّلْحُ خَيْرٌ وَ هُوَ أَنْ تَكُونَ اَلْمَرْأَةُ عِنْدَ اَلرَّجُلِ لاَ تُعْجِبُهُ فَيُرِيدُ طَلاَقَهَا فَتَقُولُ لَهُ أَمْسِكْنِي وَ لاَ تُطَلِّقْنِي وَ أَدَعُ لَكَ مَا عَلَى ظَهْرِكَ وَ أُحِلُّ لَكَ يَوْمِي وَ لَيْلَتِي فَقَدْ طَابَ ذَلِكَ لَهُ رَوَى ذَلِكَ اَلْمُفَضَّلُ بْنُ صَالِحٍ عَنْ زَيْدٍ اَلشَّحَّامِ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ. فَإِذَا نَشَزَتِ الْمَرْأَةُ كَنُشُوزِ الرَّجُلِ فَهُوَ خُلْعٌ فَإِذَا كَانَ مِنَ الْمَرْأَةِ فَهُوَ أَنْ لَا تُطِيعَهُ فِي فِرَاشِهِ وَ هُوَ مَا قَالَ اللَّهُ عَزَّ وَ جَلَّ وَ اللَّاتِي تَخافُونَ نُشُوزَهُنَّ فَعِظُوهُنَ وَ اهْجُرُوهُنَّ فِي الْمَضاجِعِ وَ اضْرِبُوهُنَ فَالْهَجْرُ أَنْ يُحَوِّلَ إِلَيْهَا ظَهْرَهُ وَ الضَّرْبُ بِالسِّوَاكِ وَ غَيْرِهِ ضَرْباً رَفِيقاً فَإِنْ أَطَعْنَكُمْ فَلا تَبْغُوا عَلَيْهِنَّ سَبِيلًا إِنَّ اللَّهَ كانَ عَلِيًّا كَبِيراً.
Disobedience (nushuz) can occur from both the man and the woman.
As for the man's disobedience, it is as Allah (swt), the Mighty and Majestic, says in His Book:
"And if a woman fears ill-treatment or aversion from her husband, there is no blame upon them if they reconcile between themselves, and reconciliation is better" (Surah An-Nisa 4:128)
This refers to a situation where a woman is with her husband, but he is displeased with her and intends to divorce her. She then says to him, "Keep me and do not divorce me, and I will relinquish what is due to me and allow you my day and night."
This arrangement becomes acceptable to him. This was narrated by Al-Mufaddal ibn Salih from Zayd Al-Shahham from Abu Abdullah 
.
When a woman becomes disobedient (nashiz) like a man's disobedience, it leads to khulʿ (a form of divorce initiated by the wife). A woman's disobedience is when she does not obey her husband in matters of intimacy.
This is as Allah (swt), the Mighty and Majestic, says:
"And those [wives] from whom you fear arrogance [disobedience]-advise them; [then if they persist], forsake them in bed; and [finally], strike them. But if they obey you, seek no means against them. Indeed, Allah (swt) is Most High, Most Great" (Surah An-Nisa 4:34)
Forsaking them in bed means turning his back to her, and striking refers to gently striking with a miswak (tooth-stick) or something similar, in a kind manner.
If they obey you, then do not seek a way against them, for Allah (swt) is Most High and Most Great.
