Isa bin Yunus narrated it from Abu Bakr bin Abi Maryam, from Rashid bin Sa'd, from Thawban (may Allah be pleased with him), who said: The Messenger of Allah (peace and blessings be upon him) went out with a funeral and saw people riding, so he said: "Are you not ashamed? The angels of Allah are on their feet while you are on the backs of mounts!"
A group likewise narrated it from Isa. Thawr bin Yazid narrated it from Rashid bin Sa'd from Thawban as mawquf (stopping at the Companion), and this indicates that the mawquf version is more correct; al-Bukhari also said so.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6856