Sahih al-Bukhari, Volume 5, Book 58, Hadith 135 (USC-MSA) ⓘ
Narrated Abu Humaid: The Prophet said, "The best of the Ansar families (homes) are the families (homes) of Banu An- Najjar, and then that of Banu `Abdul Ash-hal, and then that of Banu Al-Harith, and then that of Banu Saida; and there is good in all the families (homes) of the Ansar." Sa`d bin 'Ubada followed us and said, "O Abu Usaid ! Don't you see that the Prophet compared the Ansar and made us the last of them in superiority? Then Sa`d met the Prophet and said, "O Allah's Messenger! In comparing the Ansar's families (homes) as to the degree of superiority, you have made us the last of them." Allah's Messenger replied, "Isn't it sufficient that you are regarded amongst the best?"
حَدَّثَنَا خَالِدُ بْنُ مَخْلَدٍ، حَدَّثَنَا سُلَيْمَانُ، قَالَ حَدَّثَنِي عَمْرُو بْنُ يَحْيَى، عَنْ عَبَّاسِ بْنِ سَهْلٍ، عَنْ أَبِي حُمَيْدٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " إِنَّ خَيْرَ دُورِ الأَنْصَارِ دَارُ بَنِي النَّجَّارِ، ثُمَّ عَبْدِ الأَشْهَلِ، ثُمَّ دَارُ بَنِي الْحَارِثِ، ثُمَّ بَنِي سَاعِدَةَ، وَفِي كُلِّ دُورِ الأَنْصَارِ خَيْرٌ ". فَلَحِقْنَا سَعْدَ بْنَ عُبَادَةَ فَقَالَ أَبَا أُسَيْدٍ أَلَمْ تَرَ أَنَّ نَبِيَّ اللَّهِ صلى الله عليه وسلم خَيَّرَ الأَنْصَارَ فَجَعَلَنَا أَخِيرًا فَأَدْرَكَ سَعْدٌ النَّبِيَّ صلى الله عليه وسلم فَقَالَ يَا رَسُولَ اللَّهِ، خُيِّرَ دُورُ الأَنْصَارِ فَجُعِلْنَا آخِرًا. فَقَالَ " أَوَلَيْسَ بِحَسْبِكُمْ أَنْ تَكُونُوا مِنَ الْخِيَارِ ".
also referenced under: Book 63, Hadith 17 (In-Book) & Hadith 3791 (DarusSalam)