Full Sharh — Mishkat al-Masabih 729
وَعَنِ ابْنِ عَبَّاسٍ قَالَ: أَقْبَلْتُ رَاكِبًا عَلَى أَتَانٍ وَأَنَا يَوْمَئِذٍ قَدْ نَاهَزْتُ الِاحْتِلَامَ وَرَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي بِالنَّاسِ بِمِنًى إِلَى غَيْرِ جِدَارٍ فَمَرَرْتُ بَين يَدي الصَّفّ فَنزلت فَأرْسلت الْأَتَانَ تَرْتَعُ وَدَخَلْتُ فِي الصَّفِّ فَلَمْ يُنْكِرْ ذَلِك عَليّ أحد
English Translation
Ibn ‘Abbas said, “When I was near the age of puberty I came riding on a she-ass and found God’s Messenger leading the people in prayer at Mina with no wall in front of him. I passed in front of part of the row of worshippers, and dismounting, let my she-ass go to pasture and joined the row, and no one objected to that.” (Bukhari and Muslim.)
Source
Mishkat al-Masabih(مشكاة المصابيح)
Prayer
Hadith Number
729