The Prophet ﷺ saw a man driving a sacrificial camel while exhausted from walking. He said, "Ride it."The man replied, "It is a sacrificial camel."The Prophet ﷺ said, "Ride it, even if it is a sacrificial camel."
أخبرنا محمد بن المثنى قال حدثنا خالد قال حدثنا حميد عن ثابت
أن النبي ﷺ رأى رجلا يسوق بدنة وقد جهده المشي قال اركبها قال إنها بدنة قال اركبها وإن كانت بدنة
Muslim reported it in Hajj, chapter on the permissibility of riding the sacrificial camel dedicated as an offering for one who needs it, hadith 1323, from the hadith of Humayd Tawil, with this chain, and it is in Al-Kubra, hadith 3783.