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).