question #3 Sahih al-Bukhari 826, Book 10, Hadith 220 : What can be learned from the way companions of the Prophet observed and remembered his prayer practices?

`Imran and I prayed behind `Ali bin Abi Talib and he said Takbir on prostrating, on rising and on
getting up after the two rak`at (i.e. after the second rak`a). When the prayer was finished, `Imran took
me by the hand and said, “He (`Ali) has prayed the prayer of Muhammad” (or said, “He made us
remember the prayer of Muhammad).