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 1368
Arabic hadith text
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، عَنْ مَالِكِ بْنِ أَنَسٍ، فِيمَا قُرِئَ عَلَيْهِ عَنْ إِسْحَاقَ بْنِ عَبْدِ، اللَّهِ بْنِ أَبِي طَلْحَةَ عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ "اللَّهُمَّ بَارِكْ لَهُمْ فِي مِكْيَالِهِمْ وَبَارِكْ لَهُمْ فِي صَاعِهِمْ وَبَارِكْ لَهُمْ فِي مُدِّهِمْ "
Translation
Anas b. Malik (Allah be pleased with him) reported that Allah's Messenger (ﷺ) said
Allah bless them in their measurements, bless them in their sa's and bless them in their mudd.