Musnad Abu Ya'la al-Mawsili 42:12

Zuhayr narrated to us, Yahya bin Sa'id narrated to us, from Anis bin Abi Yahya, my father narrated to me, he said: I heard Abu Sa'id al-Khudri saying: A man from Banu 'Amr bin 'Awf and a man from Banu Khudrah disputed regarding the mosque which was founded on righteousness. The Khudri said: "It is the Mosque of the Messenger of Allah, may Allah bless him and grant him peace." The 'Amri said: "It is the Mosque of Quba." He said: So they went out until they came to the Messenger of Allah, may Allah bless him and grant him peace, and asked him about that. He said: "It is this mosque, the Mosque of the Messenger of Allah, and in that is much good."