The worthiest clans of the Ansar are Banu Najjar, thereafter Banu al-Ashhal; thereafter Banu Harith b. Banu Khazraj; thereafter Banu Sa'idah and there is goodness in all clans of the Ansar. Sa'd said: I see that he (the Holy Prophet) has placed others above us. It was said to (him): He has placed you above many others. (Using translation from Muslim 2511a)
قَالَ رَسُولُ اللهِ ﷺ «خَيْرُ دُورِ الْأَنْصَارِ بَنُو النَّجَّارِ ثُمَّ بَنُو عَبْدِ الْأَشْهَلِ ثُمَّ بَنُو الْحَارِثِ بْنِ الْخَزْرَجِ ثُمَّ بَنُو سَاعِدَةَ وَفِي كُلِّ دُورِ الْأَنْصَارِ خَيْرُ» قَالَ سَعْدٌ مَا أَرَى رَسُولَ اللهِ ﷺ إِلَّا قَدْ فَضَّلَ عَلَيْنَا فَقِيلَ «قَدْ فَضَّلَكُمْ عَلَى كَثِيرٍ»