Musnad Abu Ya'la al-Mawsili 129:138

Zuhayr informed us, Yazid narrated to us, Yahya and Humayd informed us, from Anas bin Malik, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Shall I not inform you of the best of the houses of the Ansar?" They said: "Yes, O Messenger of Allah." He said: "The houses of Banu al-Najjar, then the houses of Banu Abd al-Ashhal, then the houses of Banu al-Harith bin al-Khazraj, then the houses of Banu Sa'idah." Then the Messenger of Allah (peace and blessings of Allah be upon him) said: "And in every house of the Ansar there is good." One of them said: "And he raised his voice with that."