The Messenger of Allah ﷺ held a horse race and offered a prize for it.
حدثنا عتاب أخبرنا عبيد الله بن عمر عن نافع
أن رسول الله ﷺ سبق بالخيل وراهن
No references are available.
Its isnad is sahih, and it is an abridgment of 5181.