Abu Dawud

Urdu marginal note:
It is permissible to return riding (on a mount) after performing the funeral prayer. There is no difference of opinion in this matter. It is also permissible to go (to the funeral) riding. For details, see the benefits and issues of Hadith: 1944.

Hadith Commentary: Benefits and Issues: To precede the imam in any pillar (rukn) of the prayer is a sign and indication of foolishness, stupidity, and lack of sense, and in this characteristic, the donkey is well-known. And according to the principle that the punishment corresponds to the nature of the deed, Allah, Lord of all the worlds, can distort the appearance and form of such a person, making it like the form of a donkey. And this is not difficult for Him. Therefore, a person performing prayer should not precede the imam in any pillar, for who knows if the wrath of Allah may be provoked and the appearance of such a person may be transformed. This is a warning (wa‘id), and its occurrence depends on the will (mashiyyah) of Allah, so its occurrence is not necessary. And Mulla Ali Qari has narrated an incident of a muhaddith, that he considered the occurrence of this warning to be far-fetched and, in prayer, committed the act of preceding the imam, so Allah transformed his face to resemble that of a donkey; thus, he would narrate hadiths to people from behind a curtain. (Fath al-Mulhim: 2/64)