Sahih al-Bukhari 496

Arabic

حَدَّثَنَا عَمْرُو بْنُ زُرَارَةَ، قَالَ أَخْبَرَنَا عَبْدُ الْعَزِيزِ بْنُ أَبِي حَازِمٍ، عَنْ أَبِيهِ، عَنْ سَهْلٍ، قَالَ كَانَ بَيْنَ مُصَلَّى رَسُولِ اللَّهِ صلى الله عليه وسلم وَبَيْنَ الْجِدَارِ مَمَرُّ الشَّاةِ‏.‏

English translation

Narrated Sahl (bin Sa`d):The distance between the Musalla of Allah's Messenger (ﷺ) and the wall was just sufficient for a sheep to pass through

Reference: Sahih al-Bukhari 496, Book of Prayers (Salat). English translation by Dr. Muhammad Muhsin Khan.