Musnad Abu Ya'la al-Mawsili 118:43

Zuhayr narrated to us, Wahb ibn Jarir narrated to us, my father narrated to us, he said: I heard Yunus narrating from al-Zuhri, from Anas, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "O Allah, place in Medina double what is in Mecca of blessing."