The Prophet (blessings and peace of Allah be upon him) instructed the one who is praying to have a barrier (sutrah) in front of him, so that no one will pass in front of him and interrupt his prayer. But in the case of the congregational prayer, the imam is the “barrier” for those who are praying behind him. In this hadith, Ibn ‘Abbas (may Allah be pleased with him) narrated that he came riding on a female donkey. At that time, Ibn ‘Abbas (may Allah be pleased with him) was a boy who was approaching puberty. The Messenger of Allah (blessings and peace of Allah be upon him) was praying in Mina without a barrier such as a wall and the like. Mina is a valley near the Haram of Makkah where the pilgrims halt to stone the Jamarat. Ibn ‘Abbas (may Allah be pleased with him) passed in front of one of the rows of worshippers whilst he was riding his donkey, at the time when their imam – namely the Prophet (blessings and peace of Allah be upon him) did not have a barrier in front of him. Then he left the donkey to eat and graze, and wander among the rows, then he joined the people in the rows and prayed, and no one rebuked him for passing in front of the rows or for letting the donkey pass in front of them, and the Prophet (blessings and peace of Allah be upon him) did not interrupt the prayer. This hadith indicates that the imam is like a barrier for those praying behind him. It also indicates that it is valid for a young boy who has reached the age of discernment to hear a hadith and narrate it..