Sahih Muslim Book 7, Hadith Number 3180.

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.

Ibn ‘Umar (Allah be pleased with them) reported Allah’s Messenger (may peace be upon him) as saying: He who patiently endures the hardships of it (of this city of Medina), I would be an intercessor or a witness on his behalf on the Day of Resurrection.