question #1 Sahih al-Bukhari 6570, Book 81, Hadith 158 : Who is considered the luckiest person to receive the Prophet’s intercession on the Day of Resurrection?

I said, “O Allah’s Messenger (ﷺ)! Who will be the luckiest person who will gain your intercession on the Day
of Resurrection?” The Prophet (ﷺ) said, “O Abu Huraira! I have thought that none will ask me about this
Hadith before you, as I know your longing for the (learning of) Hadiths. The luckiest person who will
have my intercession on the Day of Resurrection will be the one who said, ‘None has the right to be
worshipped but Allah,’ sincerely from the bottom of his heart.”