Characteristics of Prayer

Bukhari :: Book 1 :: Volume 12 :: Hadith 820

Narrated Ibn 'Abbas:

Once I came riding a she-ass and I, then, had just attained the age of puberty. Allah's Apostle was leading the people in prayer at Mina facing no wall. I passed in front of the row and let loose the she-ass for grazing and joined the row and no one objected to my deed.