(dissension) is made between two connected things, it is used to mean the divorce:

 …هُنَّ لِبَاسٌ لَّكُمْ وَأَنتُمْ لِبَاسٌ لَّهُنَّ..

(They are clothing for you and you are clothing for them) (Al-Baqara: 187)

(… إِن يُرِيدَا إِصْلَاحًا يُوَفِّقِ اللَّهُ بَيْنَهُمَا ۗ إِنَّ اللَّهَ كَانَ عَلِيمًا خَبِيرًا …) (…If they both desire reconciliation, Allah will cause it between them. Indeed, Allah is ever Knowing and Acquainted [with all things]. …): Allah (swt) not just is ever Knowing but Acquainted with the intentions and deeds and accordingly, the reconciliation is made between the wife and her husband.

This verse reminds us of what the Kharijites did at the beginning of the Islamic era with Imam Ali bin Abi Talib (May Allah honour his face) when he accepted arbitration, they stood against him for accepting the arbitration referring to this verse:

إِنِ الْحُكْمُ إِلَّا لِلَّهِ

(Legislation is not but for Allah) (Yusuf: 40)

So the Imam recited this verse, of our study, to them indicating that Allah (swt) commanded and accept it.