question #1 Sahih al-Bukhari 1200, Book 21, Hadith 4 : What changes were made to the conduct of prayer after the revelation of a specific verse in the Quran?

In the lifetime of the Prophet (ﷺ) we used to speak while praying, and one of us would tell his needs to his
companions, till the verse, ‘Guard strictly your prayers (2.238) was revealed. After that we were
ordered to remain silent while praying.