Sahih Muslim , Book 15, Hadith 419 (In-Book) ⓘ
Abu Zubair reported: I asked Jabir (Allah be pleased with him) about riding on the sacrificial animal, to which he replied: I heard Allah's Apostle as saying: Ride on them gently until you find another mount.
وَحَدَّثَنِي سَلَمَةُ بْنُ شَبِيبٍ، حَدَّثَنَا الْحَسَنُ بْنُ أَعْيَنَ، حَدَّثَنَا مَعْقِلٌ، عَنْ أَبِي الزُّبَيْرِ، قَالَ سَأَلْتُ جَابِرًا عَنْ رُكُوبِ الْهَدْىِ، فَقَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ " ارْكَبْهَا بِالْمَعْرُوفِ حَتَّى تَجِدَ ظَهْرًا " .
also referenced under: Hadith 1324 (Reference) & Book 7, Hadith 3053 (USC-MSA)