Sahih Muslim Book 7, Hadith Number 3183.

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 Huraira (Allah be pleased with him) reported the Apostle of Allah (may peace be upon him) as saying: For one among my Ummah who shows endurance against the hardships and rigours of Medina, I would be an intercessor or a witness on his behalf on the Day of Resurrection.