Hadith: O people, verily Allah has removed the arrogance of jāhiliyyah from you and their boastfulness about their forefathers

عَنِ ‌ابْنِ عُمَرَ رضي الله عنهما:
أَنَّ رَسُولَ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ خَطَبَ النَّاسَ يَوْمَ فَتْحِ مَكَّةَ، فَقَالَ: «يَا أَيُّهَا النَّاسُ، إِنَّ اللهَ قَدْ أَذْهَبَ عَنْكُمْ عُبِّيَّةَ الْجَاهِلِيَّةِ وَتَعَاظُمَهَا بِآبَائِهَا، فَالنَّاسُ رَجُلَانِ: بَرٌّ تَقِيٌّ كَرِيمٌ عَلَى اللهِ، وَفَاجِرٌ شَقِيٌّ هَيِّنٌ عَلَى اللهِ، وَالنَّاسُ بَنُو آدَمَ، وَخَلَقَ اللهُ آدَمَ مِنْ تُرَابٍ، قَالَ اللهُ: {يَا أَيُّهَا النَّاسُ إِنَّا خَلَقْنَاكُمْ مِنْ ذَكَرٍ وَأُنْثَى وَجَعَلْنَاكُمْ شُعُوبًا وَقَبَائِلَ لِتَعَارَفُوا إِنَّ أَكْرَمَكُمْ عِنْدَ اللهِ أَتْقَاكُمْ إِنَّ اللهَ عَلِيمٌ خَبِيرٌ} [الحجرات: 13]».
[صحيح] - [رواه الترمذي وابن حبان] - [سنن الترمذي: 3270]

Ibn ‘Umar (may Allah be pleased with him) reported:
The Messenger of Allah (may Allah's peace and blessings be upon him) delivered a speech on the day of the Conquest of Makkah. He said: "O people, verily Allah has removed the arrogance of jāhiliyyah from you and their boastfulness about their forefathers. So, now, there are two types of men: a righteous, pious, and honorable person in the sight of Allah and a wicked, wretched, and insignificant person in the sight of Allah. People are the children of Adam, and Allah created Adam from dust. Allah says: {O mankind, We have created you from a male and a female, and made you into nations and tribes so that you may recognize one another. Indeed, the most noble of you before Allah is the most righteous among you. Indeed, Allah is All-Knowing and all-aware.} [Surat al-Hujurāt: 13]"
Sahih/Authentic. - [At-Tirmidhi]

Explanation

The Prophet (may Allah's peace and blessings be upon him) delivered a speech on the day of the Conquest of Makkah, saying: O people, indeed Allah removed from you the arrogance and fanaticism of jāhiliyyah and the boastfulness about one's ancestors. People are of two types:
Either a believer who is pious, righteous, and obedient to Allah Almighty - and this is honorable in the sight of Allah, even if he does not occupy high status among the people.
Or a disbeliever who is wicked and wretched - and this is insignificant and worthless in the sight of Allah, even if he occupies a high status, strong position and authority.
People are the children of Adam, and Allah created Adam from dust. Allah says: {O mankind, We have created you from a male and a female, and made you into nations and tribes so that you may recognize one another. Indeed, the most noble of you before Allah is the most righteous among you. Indeed, Allah is All-Knowing and all-aware.} [Surat al-Hujurāt: 13]"