question #1 Sahih al-Bukhari 564, Book 9, Hadith 41 : What significance does the Prophet Muhammad (ﷺ) attribute to the night of the `Isha’ prayer in this narration?

“One night Allah’s Messenger (ﷺ) led us in the `Isha’ prayer and that is the one called Al-`Atma [??] by the
people. After the completion of the prayer, he faced us and said, “Do you know the importance of this
night? Nobody present on the surface of the earth tonight will be living after one hundred years from
this night.” (See Hadith No. 575).