The Prophet ﷺ said: Allah, Most High, has removed from you the pride of the pre-Islamic period and its boasting in ancestors. One is only a pious believer or a miserable sinner. You are sons of Adam, and Adam came from dust. Let the people cease to boast about their ancestors. They are merely fuel in Jahannam; or they will certainly be of less account with Allah than the beetle which rolls dung with its nose.  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ اللَّهَ ﷻ قَدْ أَذْهَبَ عَنْكُمْ عُبِّيَّةَ الْجَاهِلِيَّةِ وَفَخْرَهَا بِالآبَاءِ مُؤْمِنٌ تَقِيٌّ وَفَاجِرٌ شَقِيٌّ أَنْتُمْ بَنُو آدَمَ وَآدَمُ مِنْ تُرَابٍ لَيَدَعَنَّ رِجَالٌ فَخْرَهُمْ بِأَقْوَامٍ إِنَّمَا هُمْ فَحْمٌ مِنْ فَحْمِ جَهَنَّمَ أَوْ لَيَكُونُنَّ أَهْوَنَ عَلَى اللَّهِ مِنَ الْجِعْلاَنِ الَّتِي تَدْفَعُ بِأَنْفِهَا النَّتْنَ