Sa'id bin Abi Hnd سعيد بن أبي هند الفزاري · Jihad (Kitab Al-Jihad)

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.