You would soon conquer a land where people are in the habit of using foul language. They have a right of kinship upon you. And when you see two persons fighting for the space of a brick, then get out of that. He (Abu Dharr) then happened to pass by Rabila and 'Abd al-Rahman, the two sons of Shurahbil b. Hasana, and they had been disputing for the space of a brick. So he left the land. (Using translation from Muslim 2543a)   

قَالَ رَسُولُ اللهِ ﷺ إِنَّكُمْ سَتَفْتَحُونَ أَرْضًا يُذْكَرُ فِيهَا الْقِيرَاطُ فَاسْتَوْصُوا بِأَهْلِهَا خَيْرًا فَإِنَّ لَهُمْ ذِمَّةً وَرَحِمًا فَإِذَا رَأَيْتُمْ رَجُلَيْنِ يَقْتَتِلَانِ عَلَى مَوْضِعِ لَبِنَةٍ فَاخْرُجْ مِنْهَا قَالَ فَمَرَّ بِرَبِيعَةَ وَعَبْدِ الرَّحْمَنِ ابْنَيْ شُرَحْبِيلَ ابْنِ حَسَنَةَ يَتَنَازَعَانِ فِي مَوْضِعِ لَبِنَةٍ فَخَرَجَ مِنْهَا  

[Machine] So there was nothing except Friday or something like that until he was killed, then permission was given to the Companions of the Prophet ﷺ , then permission was given to the people of Madinah, then permission was given to the people of Sham, then permission was given to the people of Iraq. So we were among the last to enter (the mosque), when suddenly there was a black turban or a black-clothed person who was attacked by a dagger and blood started flowing. So we said, "Advise us, O Commander of the Believers." He said, "I advise you to follow the Book of Allah, for you will never be misguided as long as you follow it, and I advise you to follow the emigrants, for the people will increase and decrease, and I advise you to follow the Ansar, for they are the people of Islam who have taken refuge (in Madinah), and I advise you to follow the Bedouins, for they are your roots and your supplies." He also said this again, "I advise you to follow them, for they are your brothers and the enemies of your enemies." And he advised us to protect the covenant of Allah, for it is the covenant of your Prophet ﷺ , and the provision for your families." Then he said, "Leave me now."  

فَمَا كَانَتْ إِلَّا جُمُعَةٌ أَوْ نَحْوُ ذَلِكَ حَتَّى أُصِيبَ ثُمَّ أَذِنَ لِأَصْحَابِ النَّبِيِّ ﷺ ثُمَّ أَذِنَ لِأَهْلِ الْمَدِينَةِ ثُمَّ أَذِنَ لِأَهْلِ الشَّامِ ثُمَّ أَذِنَ لِأَهْلِ الْعِرَاقِ فَكُنَّا فِي آخِرِ مَنْ دَخَلَ فَإِذَا عِمَامَةٌ سَوْدَاءُ أَوْ بُرْدٌ أَسْوَدُ قَدْ عُصِبَ عَلَى طَعْنَتِهِ وَإِذَا الدَّمُ يَسِيلُ فَقُلْنَا أَوْصِنَا يَا أَمِيرَ الْمُؤْمِنِينَ فَقَالَ أُوصِيكُمْ بِكِتَابِ اللهِ فَإِنَّكُمْ لَنْ تَضِلُّوا مَا اتَّبَعْتُمُوهُ وَأُوصِيكُمْ بِالْمُهَاجِرِينَ فَإِنَّ النَّاسَ يَكْثُرُونَ وَيَقِلُّونَ وَأُوصِيكُمْ بِالْأَنْصَارِ فَإِنَّهُمْ شَعْبُ الْإِسْلَامِ الَّذِي نَجَا إِلَيْهِ وَأُوصِيكُمْ بِالْأَعْرَابِ فَإِنَّهُمْ أَصْلُكُمْ وَمَادَّتُكُمْ وَقَالَ مَرَّةً أُخْرَى فَإِنَّهُمْ إِخْوَانُكُمْ وَعَدُوُّ عَدُوِّكُمْ وَأُوصِيكُمْ بِذِمَّةِ اللهِ فَإِنَّهُمْ ذِمَّةُ نَبِيِّكُمْ ﷺ وَرِزْقُ عِيَالِكُمْ ثُمَّ قَالَ قُومُوا عَنِّي  

[Machine] About Abu Bakr ibn Ayyash.  

عَنْ أَبِي بَكْرِ بْنِ عَيَّاشٍ