كتاب الحج
15  
The Book of Pilgrimage
(85)
Chapter: 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
(85)
باب فَضْلِ الْمَدِينَةِ وَدُعَاءِ النَّبِيِّ صلى الله عليه وسلم فِيهَا بِالْبَرَكَةِ وَبَيَانِ تَحْرِيمِها وَتَحْرِيمِ صَيْدِهَا وَشَجَرِهَا وَبَيَانِ حُدُودِ حَرَمِهَا
Sahih Muslim 1368

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.
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 ‏"‏ ‏.‏
Reference : Sahih Muslim 1368
In-book reference : Book 15, Hadith 529
USC-MSA web (English) reference : Book 7, Hadith 3161
  (deprecated numbering scheme)