(85) باب فَضْلِ الْمَدِينَةِ وَدُعَاءِ النَّبِيِّ صلى الله عليه وسلم فِيهَا بِالْبَرَكَةِ وَبَيَانِ تَحْرِيمِها وَتَحْرِيمِ صَيْدِهَا وَشَجَرِهَا وَبَيَانِ حُدُودِ حَرَمِهَا
Abu Huraira (Allah be pleased with him) reported that Allah's Messenger (ﷺ) declared sacred the territory between two lava mountains of Medina. Abu Huraira said:
If I were to find deer in the territory between the two mountains, I would not molest them, and he (the Holy Prophet) declared twelve miles of suburb around Medina as a prohibited pasture.
Reference: Sahih Muslim 1372 b
In-book reference: Book 15, Hadith 537
USC-MSA web (English) reference(deprecated numbering scheme): Book 7, Hadith 3169