Sunan An-Nasa'i - سنن النسائي
28. The Book of Horses, Races and Shooting - كتاب الخيل
12) Chapter: Finish Line Of A Race For Horses That Have Not Been Made Lean
It was narrated from Ibn 'Umar that the Messenger of Allah organized a horse race and sent them from Al-Hafya' and its finish line was Thaniyyat Al-Wada'; and he organized a race for horses that had not been made lean, and the course stretched from Ath-Thaniyyah to the Masjid of Banu Zuraiq.
12) باب غَايَةِ السَّبَقِ لِلَّتِي لَمْ تُضْمَرْ
أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم سَابَقَ بَيْنَ الْخَيْلِ يُرْسِلُهَا مِنَ الْحَفْيَاءِ وَكَانَ أَمَدُهَا ثَنِيَّةَ الْوَدَاعِ وَسَابَقَ بَيْنَ الْخَيْلِ الَّتِي لَمْ تُضْمَرْ وَكَانَ أَمَدُهَا مِنَ الثَّنِيَّةِ إِلَى مَسْجِدِ بَنِي زُرَيْقٍ .