Sahih Muslim Book 7, Hadith Number 3164.

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.

A Hadith like this has been narrated on the authority of A’mash with the same chain of transmitters (but at the end) these words are added: “He who violated the covenant with a Muslim, there is upon him the curse of Allah, of angels and of all people. Neither an obligatory act nor a supererogatory act would be accepted from him as recompense on the Day of Resurrection; and in the Hadith transmitted by two other narrators these words are not found: “He who claimed false paternity.” And in the Hadith transmitted by Waki’ there is no mention of the Day of Resurrection.