Anas ibn Malik reported: The Prophet, peace and blessings be upon him, said, “Medina is a sanctuary from this place to its borders. Its trees should not be cut. No heresy should be innovated or any sin should be committed in it. Whoever innovates a heresy within it or commits sins, he will invoke the curse of Allah, the angels, and the people altogether.”
Source: Ṣaḥīḥ al-Bukhārī 1768
Grade: Sahih (authentic) according to Al-Bukhari
عَنْ أَنَسٍ رَضِيَ اللَّهُ عَنْهُ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ الْمَدِينَةُ حَرَمٌ مِنْ كَذَا إِلَى كَذَا لَا يُقْطَعُ شَجَرُهَا وَلَا يُحْدَثُ فِيهَا حَدَثٌ مَنْ أَحْدَثَ حَدَثًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلَائِكَةِ وَالنَّاسِ أَجْمَعِينَ
1768 صحيح البخاري كتاب فضائل المدينة باب حرم المدينة