The virtue of Al-Madinah and the Prophet's Prayer for it to be blessed. Its sanctity and the sanctity of its game and trees. The Boundaries of its sanctuary Sahih Muslim 1365 b

Arabic hadith text
وَحَدَّثَنَاهُ سَعِيدُ بْنُ مَنْصُورٍ، وَقُتَيْبَةُ بْنُ سَعِيدٍ، قَالاَ حَدَّثَنَا يَعْقُوبُ، - وَهُوَ ابْنُ عَبْدِ الرَّحْمَنِ الْقَارِيُّ - عَنْ عَمْرِو بْنِ أَبِي عَمْرٍو، عَنْ أَنَسِ بْنِ مَالِكٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم ‏.‏ بِمِثْلِهِ غَيْرَ أَنَّهُ قَالَ ‏"‏ إِنِّي أُحَرِّمُ مَا بَيْنَ لاَبَتَيْهَا
Translation
Anas b. Malik reported a hadith like this from Allah's Apostle (ﷺ) except with this variation that he said

" I declare sacred the area between its two lava mountains."