Musnad Abu Ya'la al-Mawsili 230:1

Harun ibn Abdullah narrated to us, Abu Usamah narrated to us, he said: Abd al-Hamid ibn Ja'far al-Ansari narrated to me, Abu al-Abrad, the freed slave of Banu Khatmah, narrated to us that he heard Usayd ibn Zuhayr al-Ansari, that he heard the Prophet, peace and blessings of Allah be upon him, saying: "A prayer in the Mosque of Quba is like an Umrah."