question #3 Sahih al-Bukhari 925, Book 11, Hadith 49 : What does the term ‘Amma ba’du’ signify in the context of Islamic speeches or sermons?

One night Allah’s Messenger (ﷺ) (p.b.u.h) stood up after the prayer and recited “Tashah-hud” and then
praised Allah as He deserved and said, “Amma ba’du.”