It is not permissible for a Muslim to have estranged relations with his brother beyond three nights, the one turning one way and the other turning the other way when they meet; the better of the two is one who is the first to give a greeting.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَحِلُّ لِمُسْلِمٍ أَنْ يَهْجُرَ أَخَاهُ فَوْقَ ثَلاَثِ لَيَالٍ يَلْتَقِيَانِ فَيُعْرِضُ هَذَا وَيُعْرِضُ هَذَا وَخَيْرُهُمَا الَّذِي يَبْدَأُ بِالسَّلاَمِ  

" The one turning away and the other turning away when they meet and one avoids the other and the other also avoids him."  

عَنِ الزُّهْرِيِّ بِإِسْنَادِ مَالِكٍ وَمِثْلِ حَدِيثِهِ إِلاَّ قَوْلَهُ فَيُعْرِضُ هَذَا وَيُعْرِضُ هَذَا فَإِنَّهُمْ جَمِيعًا قَالُوا فِي حَدِيثِهِمْ غَيْرَ مَالِكٍ فَيَصُدُّ هَذَا وَيَصُدُّ هَذَا  

It is not permissible for a Muslim to have estranged relations with his brother beyond three days.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَحِلُّ لِلْمُؤْمِنِ أَنْ يَهْجُرَ أَخَاهُ فَوْقَ ثَلاَثَةِ أَيَّامٍ  

There should be no estranged relations beyond three days.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ هِجْرَةَ بَعْدَ ثَلاَثٍ