Sunnah.com reference : Book 7, Hadith 176English translation : Book 7, Hadith 929Arabic reference : Book 7, Hadith 923
Narrated Ibn 'Umar (RA):
The Prophet (ﷺ) assigned az-Zubair the land his horse could cover at a run. He made his horse run, and when it stopped he threw his whip. He then said, "Give to him up to the spot his has reached.

[Reported by Abu Dawud, but it has weakness].
وَعَنْ اِبْنِ عُمَرَ ‏-رَضِيَ اَللَّهُ عَنْهُمَا‏- { أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-أَقْطَعَ اَلزُّبَيْرَ حُضْرَ فَرَسِهِ , فَأَجْرَى اَلْفَرَسَ حَتَّى قَامَ , ثُمَّ رَمَى سَوْطَهُ.‏ فَقَالَ : " أَعْطُوهُ حَيْثُ بَلَغَ اَلسَّوْطُ }  رَوَاهُ أَبُو دَاوُدَ وَفِيهِ ضَعْفٌ  1‏ .‏‏1 ‏- ضعيف .‏ رواه أبو داود ( 3072 )‏.‏