Sahih Bukhari Volume 001, Book 009, Hadith Number 472.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 09. Virtues Of The Prayer Hall (Sutra Of The Musalla)
Narated By Ibn 'Abbas : Once I came riding a she-ass when I had just attained the age of puberty. Allah's Apostle was offering the prayer at Mina with no wall in front of him and I passed in front of some of the row. There I dismounted and let my she-ass loose to graze and entered the row and nobody objected to me about it.