question #1 Sahih al-Bukhari 4876, Book 65, Hadith 397 : What does the revelation of certain Quranic verses in Mecca signify about the early period of Islam?

I was in the house of `Aisha, the mother of the Believers. She said, “This revelation: “Nay, but the
Hour is their appointed time (for their full recompense); and the Hour will be more previous and most
bitter.” (54.46) was revealed to Muhammad at Mecca while I was a playfull little girl.”