The Messenger of Allah ﷺ planted a spear in the ground and prayed facing it.
حدثنا يحيى أخبرني عبيد الله عن نافع
أن رسول الله ﷺ ركز الحربة يصلي إليها
No references are available.
Its isnad is sahih, and it is a repeat of 4614.