Sahih al-Bukhari 1867
Sahih al-Bukhari · Book 29: Virtues of Madinah · Haram (sanctuary) of Al-Madina
Narrated Anas:
حَدَّثَنَا أَبُو النُّعْمَانِ ، حَدَّثَنَا ثَابِتُ بْنُ يَزِيدَ ، حَدَّثَنَا عَاصِمٌ أَبُو عَبْدِ الرَّحْمَنِ الأَحْوَلُ ، عَنْ أَنَسٍ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " الْمَدِينَةُ حَرَمٌ، مِنْ كَذَا إِلَى كَذَا، لاَ يُقْطَعُ شَجَرُهَا، وَلاَ يُحْدَثُ فِيهَا حَدَثٌ، مَنْ أَحْدَثَ حَدَثًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ " .
The Prophet (ﷺ) said, "Medina is a sanctuary from that place to that. Its trees should not be cut and no heresy should be innovated nor any sin should be committed in it, and whoever innovates in it an heresy or commits sins (bad deeds), then he will incur the curse of Allah, the angels, and all the people." (See Hadith No. 409, Vol 9).