Muwatta Imam Malik Book of Hajj, Hadith 186

Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to spur on his mount in the middle of Muhassir over the distance of a stone's throw.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يُحَرِّكُ رَاحِلَتَهُ فِي بَطْنِ مُحَسِّرٍ قَدْرَ رَمْيَةٍ بِحَجَرٍ .