Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tirmidhi:3001ʿAbd b. Ḥumayd > ʿAbd al-Razzāq > Maʿmar > Bahz b. Ḥakīm from his father from his grandfather

from his father, from his grandfather that he heard the Prophet ﷺ saying about Allah, Most High saying: 'You are the best of peoples ever raised up for mankind... (3:110) He said: 'You are the completion of seventy nations, you are the best of them, and the most honorable of them to Allah."  

الترمذي:٣٠٠١حَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ حَدَّثَنَا عَبْدُ الرَّزَّاقِ عَنْ مَعْمَرٍ عَنْ بَهْزِ بْنِ حَكِيمٍ عَنْ أَبِيهِ عَنْ جَدِّهِ

أَنَّهُ سَمِعَ النَّبِيَّ ﷺ يَقُولُ فِي قَوْلِهِ ( كُنْتُمْ خَيْرَ أُمَّةٍ أُخْرِجَتْ لِلنَّاسِ ) قَالَ إِنَّكُمْ تُتِمُّونَ سَبْعِينَ أُمَّةً أَنْتُمْ خَيْرُهَا وَأَكْرَمُهَا عَلَى اللَّهِ هَذَا حَدِيثٌ حَسَنٌ وَقَدْ رَوَى غَيْرُ وَاحِدٍ هَذَا الْحَدِيثَ عَنْ بَهْزِ بْنِ حَكِيمٍ نَحْوَ هَذَا وَلَمْ يَذْكُرُوا فِيهِ ( كُنْتُمْ خَيْرَ أُمَّةٍ أُخْرِجَتْ لِلنَّاسِ )