question #1 Sahih Muslim 409a, Book 4, Hadith 75 : What is the significance of synchronizing one’s praise with that of the angels during prayer?

The Messenger of Allah (ﷺ) said: When the Imam says:” Allah listens to him who praises Him.” you should say:” O Allah, our Lord for Thee is the praise.” for if what anyone says synchronises with what the angels say, his past sins will be forgiven.