Book 9: Virtues of the Prayer Hall (Sutra of the Musalla)
Volume 1, Book 9, Number 472: Narrated 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. Volume 1, Book 9, Number 473: Narrated Ibn 'Umar: Whenever Allah's Apostle came out on 'Id day, he used to order that a Harba (a short spear) to be planted in front of him (as a Sutra for his prayer) and then he used to pray facing it with the people behind him and used to do the same while on a journey. After the Prophet , this practice was adopted by the Muslim rulers (who followed his traditions). Volume 1, Book 9, Number 474: Narrated 'Aun bin Abi Juhaifa: I heard my father saying, "The Prophet led us, and prayed a two-Rak'at Zuhr prayer and then a two-Rak'at 'Asr prayer