Yahya bin Aadm bin Sulaiman يحيى بن آدم بن سليمان · The Book on Salat (Prayer)

Allah's Messenger said: "Perform Salat in sheep pens but do not perform Salat in the camels' resting area."

from the Prophet and it is the same or similar.

"The Prophet dispatched me for something he needed. I came to him while he was performing Salat on his mount, heading east, he made the prostrations lower than the bowing."

"The Prophet (S) would pray nine Rak'ah in the night."