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