Sunan Abi Dawud 1226
سنن أبي داود#1226SahihNarrated 'Abd Allah b. 'Umar:I saw the Messenger of Allah (ﷺ) praying on a donkey while he was facing Khaibar
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiSahih Muslim (700)
In-book reference: 4:29