Narrated Anas bin Malik: Allah's Messenger (ﷺ) said, "Shall I tell you of the best families among the Ansar?" They (the people) said, "Yes, O Allah's Messenger!" The Prophet (ﷺ) said, "The best are Banu- An-Najjar, and after them are Banu `Abdil Ash-hal, and after them are Banu Al-Harith bin Al-Khazraj, and after them are Banu Sa`ida." The Prophet (ﷺ) then moved his hand by closing his fingers and then opening them like one throwing something, and then said, "Anyhow, there is good in all the families of the Ansar. "
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا لَيْثٌ، عَنْ يَحْيَى بْنِ سَعِيدٍ الأَنْصَارِيِّ، أَنَّهُ سَمِعَ أَنَسَ بْنَ مَالِكٍ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَلاَ أُخْبِرُكُمْ بِخَيْرِ دُورِ الأَنْصَارِ ". قَالُوا بَلَى يَا رَسُولَ اللَّهِ. قَالَ " بَنُو النَّجَّارِ، ثُمَّ الَّذِينَ يَلُونَهُمْ بَنُو عَبْدِ الأَشْهَلِ، ثُمَّ الَّذِينَ يَلُونَهُمْ بَنُو الْحَارِثِ بْنِ الْخَزْرَجِ، ثُمَّ الَّذِينَ يَلُونَهُمْ بَنُو سَاعِدَةَ ". ثُمَّ قَالَ بِيَدِهِ، فَقَبَضَ أَصَابِعَهُ، ثُمَّ بَسَطَهُنَّ كَالرَّامِي بِيَدِهِ ثُمَّ قَالَ " وَفِي كُلِّ دُورِ الأَنْصَارِ خَيْرٌ ".
sunnah.com