The Messenger of Allah (ﷺ) used to stand up for a funeral until the corpse was placed in the grave. A learned Jew (once) passed him and said: This is how we do. The Prophet (ﷺ) sat down and said: Sit down and act differently from them.
Sunan Abi Dawud Book 21, Hadith 88
← Previous Hadith The Prophet (ﷺ) stood up for a funeral (to show respect) and thereafter he sat down.

Sunan Abi Dawud Book 21, Hadith 87 Next Hadith → An animal was brought to the Messenger of Allah (ﷺ) while he was going with a funeral. He refused to ride on it. When the funeral was away, the animal was brought to him and he rode on it. He was asked about it. He said: The angels were on their feet. I was not to ride while they were walking. When they went away, I rode.

Sunan Abi Dawud Book 21, Hadith 89