Imam Maalik مالك بن أنس بن مالك بن أبي عامر · The Book of the Masjids

"The columns of this Minbar of mine will be in Paradise."

"Alqamah and I entered upon 'Abdullah bin Mas'ud and he said to us: 'Have these people prayed?' We said: 'No.' He said: 'Get up and pray.' So we went to stand behind him, and he put one of us on his right and the other on his left, and he prayed with no Adhan and no Iqamah. When he bowed he interlaced his fingers and placed his hands between his knees, and he said: 'I saw the Messenger of Allah…

It was narrated from Ibn 'Umar, that when he was young and single, with no family, at the time of the Messenger of Allah (ﷺ), he used to sleep in the Masjid of the Prophet (ﷺ).

"The Messenger of Allah (ﷺ) saw some sputum in the Qiblah of the Masjid, and he became so angry that his face turned red. Then a woman from the Ansar went and scratched off, and put some perfume in its place. The Messenger of Allah (ﷺ) said: 'How good this is.'"

"I heard Ka'b bin Malik telling the story of when he stayed behind from going out on the campaign of Tabuk with the Messenger of Allah (ﷺ). He said: 'The Messenger of Allah (ﷺ) came back in the morning, and when he came back from a journey he would go to the Masjid first and pray two Rak'ahs there, then he would sit to (meet with) the people. When he did that, those who had stayed behind came to him…

It was narrated from Maimunah that the Messenger of Allah (ﷺ) used to pray on a mat.

We do not know of anyone who reported anything to support what 'Amr bin Yahya said about praying on a donkey. As for the Hadith of Yahya bin Sa'eed from Anas, what is correct is that it is Mawquf. And Allah knows best. That is a saying or action of a Companion of the Prophet (ﷺ)