Mukhtasar Bukhari

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Prophet Muhammad (peace and blessings be upon him) said: "The land between the two rocky boundaries of Madinah has been declared a sanctuary by my tongue." (Further) he says that the Prophet Muhammad (peace and blessings be upon him) went to the tribe of Banu Harithah and said: "I think you have gone outside the sanctuary." Then he (peace and blessings be upon him) looked around and said: "No! You are within the sanctuary."