(Annisa) 4 : 35
وَإِنْ خِفْتُمْ شِقَاقَ بَيْنِهِمَا فَابْعَثُوا حَكَمًا مِنْ أَهْلِهِ وَحَكَمًا مِنْ أَهْلِهَا إِنْ يُرِيدَا إِصْلَاحًا يُوَفِّقِ اللَّهُ بَيْنَهُمَا ۗ إِنَّ اللَّهَ كَانَ عَلِيمًا خَبِيرًا
And if you fear split in between them, then appoint a judge from his family and a judge from her family; if they both wish unity, Lord Allah will cause unity between them, indeed, Allah is the Acquainted-Knower.
If both the couple and judges sincerely wish for unity, Lord will give chance for unity. So the believer should always consider that the Three-Time-Knower Lord has decided everything happening in the universe and has recorded in His Three-Time-Knowledge Adhikr. The Arabic Quran reading Fujjar who didn't testify Adhikr in their individual, family and social life will argue, blame and curse each other in Hell as explained in verses 2: 165-167. See explanation 2: 152, 225, 3: 165-167 and 17: 17.