question #3 Sahih al-Bukhari 861, Book 10, Hadith 252 : How does the absence of a physical barrier affect the conduct of prayer in Islam?

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