Abu Hurairah reported the Prophet ﷺ as saying “Do not treat the backs of your beasts as pulpits, for Allaah has made them subject to you only to convey you to a town which you cannot reach without difficulty and He has appointed the earth (a floor to work) for you, so conduct your business on it. (Using translation from Abū Dāʾūd 2567)   

عَنِ النَّبِيِّ ﷺ قَالَ إِيَّاكُمْ أَنْ تَتَّخِذُوا ظُهُورَ دَوَابِّكُمْ مَنَابِرَ فَإِنَّ اللهَ ﷻ إِنَّمَا سَخَّرَهَا لَكُمْ لِتُبَلِّغَكُمْ إِلَى بَلَدٍ لَمْ تَكُونُوا بَالِغِيهِ إِلَّا بِشِقِّ الْأَنْفُسِ وَجَعَلَ لَكُمُ الْأَرْضَ فَعَلَيْهَا فَاقْضُوا حَاجَاتِكُمْ  

[Machine] Abu Hurairah (may Allah be pleased with him) reported: The Prophet ﷺ said, "Ride these animals gently and treat them well. Do not use them as chairs. This was mentioned in Al-Mustadrak, and I think it is Adam ibn Abi Yasir who replaced Shababah ibn Sawwar, and Allah knows best. 10337.

Abu Al-Hasan ibn Abdan reported: I am Ahmad ibn Ubayd, and Ahmad ibn Ibrahim reported from Milihah, who reported from Yahya ibn Bukayr, who reported from Layth. Abu Abdullah Al-Hafiz reported from Abu Bakr ibn Ishaq, who reported from Al-Hasan ibn Ali ibn Ziyad, who reported from Saeed ibn Sulaiman Al-Wasiti, who mentioned it with the same chain of narration.  

عَنْ أَبِيهِ وَكَانَ مِنْ أَصْحَابِ النَّبِيِّ ﷺ أَنَّ النَّبِيَّ ﷺ قَالَ ارْكَبُوا هَذِهِ الدَّوَابَّ سَالِمَةً وَايْتَدِعُوهَا سَالِمَةً وَلَا تَتَّخِذُوهَا كَرَاسِيَّ كَذَا وَجَدْتُهُ فِي الْمُسْتَدْرَكِ وَأَظُنُّهُ آدَمَ بْنَ أَبِي إِيَاسٍ بَدَلَ شَبَابَةَ بْنِ سَوَّارٍ وَاللهُ أَعْلَمُ 10337 وَقَدْ أَخْبَرَنَا أَبُو الْحَسَنِ بْنُ عَبْدَانَ أنا أَحْمَدُ بْنُ عُبَيْدٍ ثنا أَحْمَدُ بْنُ إِبْرَاهِيمَ بْنِ مِلْحَانَ ثنا يَحْيَى بْنُ بُكَيْرٍ حَدَّثَنَا اللَّيْثُ ح وَأَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا أَبُو بَكْرِ بْنُ إِسْحَاقَ ثنا الْحَسَنُ بْنُ عَلِيِّ بْنِ زِيَادٍ ثنا سَعِيدُ بْنُ سُلَيْمَانَ الْوَاسِطِيُّ ثنا اللَّيْثُ بْنُ سَعْدٍ فَذَكَرَهُ بِإِسْنَادِهِ مِثْلَهُ