Leave them and put them off until they are turned to reconciliation.  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ تُعْرَضُ أَعْمَالُ النَّاسِ فِي كُلِّ جُمُعَةٍ مَرَّتَيْنِ يَوْمَ الاِثْنَيْنِ وَيَوْمَ الْخَمِيسِ فَيُغْفَرُ لِكُلِّ عَبْدٍ مُؤْمِنٍ إِلاَّ عَبْدًا بَيْنَهُ وَبَيْنَ أَخِيهِ شَحْنَاءُ فَيُقَالُ اتْرُكُوا أَوِ ارْكُوا هَذَيْنِ حَتَّى يَفِيئَا  

Yahya related to me from Malik from Muslim ibn Abi Maryam from Abu Salih as-Samman that Abu Hurayra said, "The actions of people are presented twice each week, on Monday and Thursday. Every trusting slave is forgiven except for a slave who has enmity between him and his brother. It is said, 'Leave these two until they turn in tawba. Leave these two until they turn in tawba.' ''  

أَنَّهُ قَالَ تُعْرَضُ أَعْمَالُ النَّاسِ كُلَّ جُمُعَةٍ مَرَّتَيْنِ يَوْمَ الاِثْنَيْنِ وَيَوْمَ الْخَمِيسِ فَيُغْفَرُ لِكُلِّ عَبْدٍ مُؤْمِنٍ إِلاَّ عَبْدًا كَانَتْ بَيْنَهُ وَبَيْنَ أَخِيهِ شَحْنَاءُ فَيُقَالُ اتْرُكُوا هَذَيْنِ حَتَّى يَفِيئَا أَوِ ارْكُوا هَذَيْنِ حَتَّى يَفِيئَا  

[Machine] "The Messenger of Allah ﷺ said, 'The gates of Paradise are opened on Monday and Thursday, and every Muslim servant who does not associate partners with Allah is forgiven, except for a man who has enmity between him and his brother. It is said, 'Leave these two until they reconcile.'"  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «تُفْتَحُ أَبْوَابُ الْجَنَّةِ يَوْمَ الِاثْنَيْنِ وَالْخَمِيسِ فَيُغْفَرُ لِكُلِّ عَبْدٍ مُسْلِمٍ لَا يُشْرِكُ بِاللَّهِ شَيْئًا إِلَّا رَجُلًا كَانَتْ بَيْنَهُ وَبَيْنَ أَخِيهِ شَحْنَاءُ فَيُقَالُ أَنْظِرُوا هَذَيْنِ حَتَّى يَصْطَلِحَا»  

"تُعْرَضُ أَعْمَالُ النَّاسِ فِي كُلِّ جُمُعَة مَرتينِ: يَوْمَ الاثنينِ، وَيَوَمْ الخَمِيسِ؛ فَيُغَفرُ لِكُل عبد مُؤمِنٍ، إِلا عبدًا بينه وَبَينَ أَخْيهِ شَحْنَاءَ، فَيُقَالُ: اتْرُكُوا هَذَينِ حتى يفيئا".