Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai-kubra:821Qutaybah b. Saʿīd > Mālik > ʿAmr b. Yaḥyá > Saʿīd b. Yasār > Ibn ʿUmar

[Machine] I saw the Messenger of Allah ﷺ praying on a donkey while headed towards Khaybar. Abu Abdur Rahman said, "Amr ibn Yahya did not follow up on his statement that he was praying on a donkey. They only say that he was praying on his mount."  

الكبرى للنسائي:٨٢١أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ عَنْ مَالِكٍ عَنْ عَمْرِو بْنِ يَحْيَى عَنْ سَعِيدِ بْنِ يَسَارٍ عَنِ ابْنِ عُمَرَ قَالَ

«رَأَيْتُ رَسُولَ اللهِ ﷺ يُصَلِّي عَلَى حِمَارٍ وَهُوَ مُتَوَجِّهٌ إِلَى خَيْبَرَ» قَالَ أَبُو عَبْدِ الرَّحْمَنِ لَمْ يُتَابَعْ عَمْرُو بْنُ يَحْيَى عَلَى قَوْلِهِ يُصَلِّي عَلَى حِمَارٍ إِنَّمَا يَقُولُونَ يُصَلِّي عَلَى رَاحِلَتِهِ