Sayyiduna Buraydah (may Allah be pleased with him) said: the Messenger of Allah (peace and blessings be upon him) was walking when suddenly a man came to him with a donkey. He said: O Messenger of Allah, ride, and I will sit behind. the Messenger of Allah (peace and blessings be upon him) said: "No, you have more right than I to ride at the front of your own animal, unless you give it to me" (that is, grant permission willingly). He said: I have given it to you (that is, you ride at the front).
Others narrated it from Abdullah as mursal.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10354