Salm Abi al-Nadr سالم بن أبي أمية - أبو النضر · The Book on Salat (Prayer)

that Allah's Messenger said: "If the one who passed in front of the person performing Salat knew what he was doing, then for him to stop (and wait for forty) would be better for him than to pass in front of him."

"The Prophet (S) would perform Salat while sitting. And he would recite while sitting. When about thirty or forty Ayah of his recitation remained he would standup and recite while he was standing, then he would bow and prostrate. Then he would do the same in the second Rak'ah."

"I watched the Prophet (S) for a month. In the two Rak'ah before Fajr he would recite: Say: "O you disbelievers!" and Say: "Allah is One"."

"I asked Aishah how the recitation of the Prophet (S) was at night. So she said: 'He would do both of those. Sometimes he was silent with his recitation and sometimes it was audible.' So I said: 'All praise is due to Allah, the One who made the matter broad.'"