Sahih Muslim Book 7, Hadith Number 3175.

Chapter : Eminence of Medina, Allah’s Apostle (may peace be upon him) showered blessings upon it. Its sacredness and unlawfulness of hunting and lopping of trees and demarcation its precincts.

Abu Sa’id Maula al-Mahri reported that he came to Abu Sa’id al-Khudri during the nights (of the turmoil) of al-Barrah, and sought his advice about leaving Medina, and complained of the high prices prevailing therein and his large family, and informed him that he could not stand the hardships of Medina and its rugged surrounding. He said to him: Woe to you; I will not advise you to do it, for I heard Allah’s Messenger (may peace be upon him) as saying: No one will endure hardships of Medina without my being an intercessor or a witness on his behalf on the Day of Resurrection), if he is a Muslim.