It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: Shall I not tell you which is the best house among the houses of the Ansar? The house of Banu Najjar, then the house of Banu Abd al-Ashhal, then the house of Banu Harith bin Khazraj, and then the house of Banu Sa'idah, and indeed there is goodness in every house of the Ansar.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 12025