The Prophet (blessings and peace of Allah be upon him) instructed the worshipper to have something as a sutrah (screen) in front of him, so that no one would pass in front of him and interrupt his prayer. In the case of congregational prayer, the imam is the sutrah for the people praying behind him. In this hadith, ‘Abdullah ibn ‘Abbas (may Allah be pleased with him) narrates that he came riding on a female donkey, and he was on the brink of puberty, but had not yet reached it. What is meant by that is the age of accountability. The Messenger of Allah (blessings and peace of Allah be upon him) was praying in Mina with no sutrah, such as a wall and the like, in front of him. Mina is a wadi near the Makkan Haram zone where the pilgrims halt on the day of at-tarwiyah, which is the eighth day of Dhu’l-Hijjah. Ibn ‘Abbas (may Allah be pleased with him) passed in front of some of the rows of worshippers, riding on his donkey, when the imam – namely the Prophet (blessings and peace of Allah be upon him) – had no sutrah, then he dismounted and left the donkey to eat grass and graze freely, wandering about in front of the rows, and he joined them in prayer, and no one objected to him doing that. This hadith indicates that it is acceptable for the imam to pray without a sutrah, and that the imam is the sutrah for those who are praying behind him. It also indicates that a minor who has reached the age of discernment may acquire knowledge and it is permissible for one who acquired knowledge as a minor to convey it to people as an adult..