Muhammad bin Salmah محمد بن سلمة بن عبد الله الباهلي · The Book of Forgetfulness (In Prayer)

"I knocked at the door when the Messenger of Allah (ﷺ) was offering a voluntary prayer. The door was in the direction of the Qiblah so he took a few steps to his right or left and opened the door, then he went back to where he was praying."

"Ali said to me: 'I was so close to the Messenger of Allah (ﷺ), closer than anyone else. I used to come to him at the end of every night, before dawn, and say: "As-salamu 'alayka ya Nabiyy Allah (Peace be upon you, O Prophet of Allah)." If he cleared his throat I would go back to my family, otherwise I would enter upon him.'"

The Messenger of Allah (ﷺ) stood up during the prayer when he should have sat, so he prostrated twice while sitting, before the taslim.

"The Messenger of Allah (ﷺ) said: 'Allah (SWT) has angels who travel around on Earth conveying to me the Salams of my Ummah.'"

The Messenger of Allah (ﷺ) came one day with a cheerful expression on his face, and we said: "We see you looking cheerful". He said: "The Angel came to me and said: 'O Muhammad, your Lord says: 'Will it not please you (to know) that no one will send salah upon you that I will send salah upon him tenfold, and no one will send salams upon you but I will send salams upon him tenfold?'"

The Prophet (ﷺ) prayed three (rak'ahs) then said the taslim. Al-Khirbaq said: "You prayed three." So he led them in praying the remaining rak'ah, then he said the taslim, then he did the two prostrations of forgetfulness, then he said the taslim (again).

He prayed subh with the Messenger of Allah (ﷺ), and when he finished praying he turned away (from the Qiblah and toward the people.)