Ash-Shama'il Al-Muhammadiyah, Book 47, Hadith 338 (In-Book)

Jaabir Radiyallahu 'Anhu says: "Rasulullah Sallallahu 'Alayhi Wasallam came to visit me (while I was ill). He did not come on the back of a mule, or on a Turkish horse". (i.e. He did not come on defective or an expensive conveyance, but came on foot).

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ‏:‏ حَدَّثَنَا عَبْدُ الرَّحْمَنِ، قَالَ‏:‏ حَدَّثَنَا سُفْيَانُ، عَنْ مُحَمَّدِ بْنِ الْمُنْكَدِرِ، عَنْ جَابِرٍ، قَالَ‏:‏ جَاءَنِي رَسُولُ اللهِ صلى الله عليه وسلم لَيْسَ برَاكِبِ بَغْلٍ وَلا بِرْذَوْنٍ‏.‏

also referenced under: Book 46, Hadith 321 (English)