question #3 Sahih Muslim 473, Book 4, Hadith 223 : How did the companions of the Prophet Muhammad (ﷺ) perceive changes in prayer practices over time?

I have never said such a light and perfect prayer as I said behind the Messenger of Allah (ﷺ). The prayer of the Messenger. of Allah (ﷺ) was well balanced. And so too was the prayer of Abu Bakr well balanced. When it was the time of ‘Umar b. al-Khattab he prolonged the morning prayer. When the Messenger of Allah (ﷺ) said: Allah listened to him who praised Him, he stood erect till we said: He has forgotten. He then prostrated and sat between two prostration till we said: He has forgotten.