Sunan At-Tirmidhi

Narrated 'Abdullah bin Buraidah:""I heard my father Buraidah saying: 'I was walking with the Prophet (ﷺ) when a man came to him with a donkey, so he said: ""O Messenger of Allah! Ride"" and the man moved toward the back. The Messenger of Allah (ﷺ) said: ""No, you have more right to the front of your beast, unless you allot it for me."" He said: ""I have allotted it for you.'"" He said: 'So he rode