Regarding the Verse: 'And (We) made you into Shu'ub and Qabail-- (49.13) that Shu'uib means the big Qabail (i.e. nations) while the Qabail (i.e. tribes) means the branch tribes.  

الشُّعُوبُ الْقَبَائِلُ الْعِظَامُ وَالْقَبَائِلُ الْبُطُونُ  

Once Messenger of Allah ﷺ was asked, "Who is the most honorable amongst the people?" He said, "The most righteous (i.e. Allah-fearing) amongst you." They said, "We do not ask you about this." He said, "Then Joseph, the prophet of Allah."  

قِيلَ يَا رَسُولَ اللَّهِ مَنْ أَكْرَمُ النَّاسِ قَالَ أَتْقَاهُمْ قَالُوا لَيْسَ عَنْ هَذَا نَسْأَلُكَ قَالَ فَيُوسُفُ نَبِيُّ اللَّهِ  

I asked Zainab bint Abi Salama (i.e. daughter of the wife of the Prophet, "Tell me about the Prophet ﷺ . Did he belong to the tribe of Mudar?" She replied, "Yes, he belonged to the tribe of Mudar and was from the offspring of An-Nadr bin Kinana."  

حَدَّثَتْنِي رَبِيبَةُ النَّبِيِّ ﷺ زَيْنَبُ ابْنَةُ أَبِي سَلَمَةَ قَالَ قُلْتُ لَهَا أَرَأَيْتِ النَّبِيَّ ﷺ أَكَانَ مِنْ مُضَرَ قَالَتْ فَمِمَّنْ كَانَ إِلاَّ مِنْ مُضَرَ مِنْ بَنِي النَّضْرِ بْنِ كِنَانَةَ  

I was told by the Rabiba (i.e. daughter of the wife of the Prophet) who, I think, was Zainab, that the Prophet (forbade the utensils (of wine called) Ad-Dubba, Al-Hantam, Al-Muqaiyar and Al-Muzaffat. I said to her, 'Tell me as to which tribe the Prophet ﷺ belonged; was he from the tribe of Mudar?'' She replied, "He belonged to the tribe of Mudar and was from the offspring of An-Nadr bin Kinana. "  

حَدَّثَنَا كُلَيْبٌ حَدَّثَتْنِي رَبِيبَةُ النَّبِيِّ ﷺ وَأَظُنُّهَا زَيْنَبَ قَالَتْ نَهَى رَسُولُ اللَّهِ ﷺ عَنِ الدُّبَّاءِ وَالْحَنْتَمِ وَالْمُقَيَّرِ وَالْمُزَفَّتِ وَقُلْتُ لَهَا أَخْبِرِينِي النَّبِيُّ ﷺ مِمَّنْ كَانَ مِنْ مُضَرَ كَانَ قَالَتْ فَمِمَّنْ كَانَ إِلاَّ مِنْ مُضَرَ كَانَ مِنْ وَلَدِ النَّضْرِ بْنِ كِنَانَةَ  

from Messenger of Allah ﷺ said, "You find that people are ˹like˺ minerals (hidden gems): those who were the best in the pre-Islamic period, are also the best in Islam, if they have ˹deep˺ understanding. You see that the best amongst the people in this respect (in positions of authority/leadership) are those who hate it most. And you see that the worst among the people is the two-faced ˹person˺ who appears to these with one face and others with another face."  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ «تَجِدُونَ النَّاسَ مَعَادِنَ خِيَارُهُمْ فِي الْجَاهِلِيَّةِ، خِيَارُهُمْ فِي الإِسْلاَمِ إِذَا فَقِهُوا؛ وَتَجِدُونَ خَيْرَ النَّاسِ فِي هَذَا الشَّأْنِ أَشَدَّهُمْ لَهُ كَرَاهِيَةً؛ وَتَجِدُونَ شَرَّ النَّاسِ ذَا الْوَجْهَيْنِ الَّذِي يَأْتِي هَؤُلاَءِ بِوَجْهٍ وَيَأْتِي هَؤُلاَءِ بِوَجْهٍ۔»  

The Prophet ﷺ said, "The tribe of Quraish has precedence over the people in this connection (i.e the right of ruling). The Muslims follow the Muslims amongst them, and the infidels follow the infidels amongst them. People are of different natures: The best amongst them in the pre-lslamic period are the best in Islam provided they comprehend the religious knowledge. You will find that the best amongst the people in this respect (i.e. of ruling) is he who hates it (i.e. the idea of ruling) most, till he is given the pledge of allegiance."  

أَنَّ النَّبِيَّ ﷺ قَالَ النَّاسُ تَبَعٌ لِقُرَيْشٍ فِي هَذَا الشَّأْنِ مُسْلِمُهُمْ تَبَعٌ لِمُسْلِمِهِمْ وَكَافِرُهُمْ تَبَعٌ لِكَافِرِهِمْ وَالنَّاسُ مَعَادِنُ خِيَارُهُمْ فِي الْجَاهِلِيَّةِ خِيَارُهُمْ فِي الإِسْلاَمِ إِذَا فَقِهُوا تَجِدُونَ مِنْ خَيْرِ النَّاسِ أَشَدَّ النَّاسِ كَرَاهِيَةً لِهَذَا الشَّأْنِ حَتَّى يَقَعَ فِيهِ