Muhammad bin Yahya bin Hiban محمد بن يحيى بن حبان · The Book on Salat (Prayer)

"On the Night of Isra, fifty prayers were made obligatory upon the Prophet. Then it was decreased until it was made five. Then it was called out: 'O Muhammad! Indeed My Word does not change; these five prayers will be recorded for you as fifty.'"

the Prophet said: "There is no Salat for the one who does not recite Fatihatil-Kitab."

"Allah's Messenger would say one Taslim for the Salat while facing forward and turning to his right side a little."

"The Prophet (S) performed two prostrations after the Salam."