Ibn Ishaq محمد بن إسحاق بن يسار‎ · The Book on Salat (Prayer)

"I heard Allah's Messenger saying: 'Perform Fajr at AI-Isfar, for indeed its reward is greater.'"

"When we awoke, we went to Allah's Messenger to inform him of the dream. He said: 'Indeed this dream is true. So go to Bilal, for he has a better and louder voice than you. Convey to him what was said to you, so that he may call (to the prayer) with that.'" He said: "When Umar bin Al-Khattab heard Bilal calling for the prayer he went to Allah's Messenger, and he was dragging his Izar, (as he was hurrying)…

"It is from the Sunnah to say the Tashahhud quietly"

"Allah's Messenger came out to us with his head bandaged from his illness. He prayed Maghrib, reciting (Surat) Al-Mursalat." "He did not pray it again until he met Allah the Might and Sublime."

"Allah's Messenger prayed the Subh prayer, and he had difficulty with the recitation. When turned (after finishing) he said: 'I think that you are reciting behind your Imam?'" He said: "We said: 'Yes, Messenger of Allah, by Allah!' He said: 'Do not do that, except for Umm Al-Kitab, for there is no Salat for one who does not recite it.'"

Allah's Messenger (S) said: "Indeed the Shaitan comes to one of you in his Salat confusing him until he does now know how much he has prayed. When one of you experiences that then let him perform two prostrations while sitting."