Sahih Al Bukhari (750)

عن عبدالله بن عمر: أن رسول الله صلى الله عليه وسلم سابق بين الخيل التي أضمرت: من الحفياء، وأمدها ثنية الوداع، وسابق بين الخيل التي لم تضمر من الثنية إلى مسجد بني زريق، وأن عبدالله بن عمر كان فيمن سابق بها.

`Abdullah ibn `Umar (may Allah be pleased with him) narrated: Allah's Messenger (peace be upon him) ordered for a horse race; the trained horses were to run from a place called Al Hafya' to Thaniyat Al Wada' and the horses which were not trained were to run from Al Thaniyah to the Masjid (mosque of) Banu Zurayq. The sub-narrator added: Ibn `Umar was one of those who took part in the race.