Regarding the explanation of the following verse:-- "If a wife fears Cruelty or desertion On her husband's part." (4.128) A man may dislike his wife and intend to divorce her, so she says to him, "I give up my rights, so do not divorce me." The above verse was revealed concerning such a case.  

عَنْ عَائِشَةَ ؓ – {وَإِنِ امْرَأَةٌ خَافَتْ مِنْ بَعْلِهَا نُشُوزًا أَوْ إِعْرَاضًا} قَالَتِ الرَّجُلُ تَكُونُ عِنْدَهُ الْمَرْأَةُ لَيْسَ بِمُسْتَكْثِرٍ مِنْهَا يُرِيدُ أَنْ يُفَارِقَهَا فَتَقُولُ أَجْعَلُكَ مِنْ شَأْنِي فِي حِلٍّ فَنَزَلَتْ هَذِهِ الآيَةُ فِي ذَلِكَ  

Regarding the Verse:--"If a woman fears cruelty or desertion on her husband's part." (4.128) It is about a man who has a woman (wife) and he does not like her and wants to divorce her but she says to him, "I make you free as regards myself." So this Verse was revealed in this connection.  

عَنْ عَائِشَةَ ؓ {وَإِنِ امْرَأَةٌ خَافَتْ مِنْ بَعْلِهَا نُشُوزًا أَوْ إِعْرَاضًا} قَالَتِ الرَّجُلُ تَكُونُ عِنْدَهُ الْمَرْأَةُ لَيْسَ بِمُسْتَكْثِرٍ مِنْهَا يُرِيدُ أَنْ يُفَارِقَهَا فَتَقُولُ أَجْعَلُكَ مِنْ شَأْنِي فِي حِلٍّ فَنَزَلَتْ هَذِهِ الآيَةُ فِي ذَلِكَ  

" And if a woman has reason to fear ill-treatment from her husband or that he might turn away from her" that it was revealed in case of a woman who lived with a person and perhaps he does not want to prolong (his relationship with her) whereas she has had sexual relationship with him (and as a result thereof) she got a child from him and she does not like that she should be divorced, so she says to him: I permit you to live with the other wife.  

عَنْ عَائِشَةَ فِي قَوْلِهِ ﷻ { وَإِنِ امْرَأَةٌ خَافَتْ مِنْ بَعْلِهَا نُشُوزًا أَوْ إِعْرَاضًا} قَالَتْ نَزَلَتْ فِي الْمَرْأَةِ تَكُونُ عِنْدَ الرَّجُلِ فَلَعَلَّهُ أَنْ لاَ يَسْتَكْثِرَ مِنْهَا وَتَكُونُ لَهَا صُحْبَةٌ وَوَلَدٌ فَتَكْرَهُ أَنْ يُفَارِقَهَا فَتَقُولُ لَهُ أَنْتَ فِي حِلٍّ مِنْ شَأْنِي  

regarding the Verse: 'If a wife fears cruelty or desertion on her husband's part ...') (4.128) It concerns the woman whose husband does not want to keep her with him any longer, but wants to divorce her and marry some other lady, so she says to him: 'Keep me and do not divorce me, and then marry another woman, and you may neither spend on me, nor sleep with me.' This is indicated by the Statement of Allah: 'There is no blame on them if they arrange an amicable settlement between them both, and (such) settlement is better." (4.128) (Using translation from Bukhārī 5206)   

عَنْ عَائِشَةَ فِي قَوْلِهِ تَعَالَى {وَإِنِ امْرَأَةٌ خَافَتْ مِنْ بَعْلِهَا نُشُوزًا أَوْ إِعْرَاضًا} [النساء 128] أُنْزِلَتْ فِي الْمَرْأَةِ تَكُونُ عِنْدَ الرَّجُلِ لَا يَسْتَكْثِرُ مِنْهَا فَيُرِيدُ أَنْ يُطَلِّقَهَا وَيَتَزَوَّجَ غَيْرَهَا فَتَقُولُ لَا تُطَلِّقْنِي وَأَمْسِكْنِي وَأَنْتَ فِي حِلٍّ مِنَ النَّفَقَةِ وَالْقِسْمَةِ لِي فَأَنْزَلَ اللهُ جَلَّ وَعَزَّ {فَلَا جُنَاحَ عَلَيْهِمَا أَنْ يُصْلِحَا بَيْنَهُمَا صُلْحًا} [النساء 128]  

[Machine] It was reported that the Prophet ﷺ divorced her, so she said, "O Messenger of Allah, do not divorce me, hold on to me, and make my day for Aisha." So he did as she requested, and then this verse was revealed: "And if a woman fears from her husband contempt or evasion, there is no sin upon them if they make terms of settlement between them" [Quran 4:128]. He said, "Whatever they agree upon is permissible."  

يُطَلِّقَهَا رَسُولُ اللهِ ﷺ فَقَالَتْ يَا رَسُولَ اللهِ لَا تُطَلِّقْنِي وَأَمْسِكْنِي وَاجْعَلْ يَوْمِي لِعَائِشَةَ فَفَعَلَ فَنَزَلَتْ هَذِهِ الْآيَةُ {وَإِنِ امْرَأَةٌ خَافَتْ مِنْ بَعْلِهَا نُشُوزًا أَوْ إِعْرَاضًا} [النساء 128] قَالَ فَمَا اصْطَلَحَا عَلَيْهِ مِنْ شَيْءٍ فَهُوَ جَائِزٌ