question #1 Sahih al-Bukhari 6590, Book 81, Hadith 178 : What concerns did the Prophet Muhammad (ﷺ) express about the future of his followers regarding worldly treasures?

Once the Prophet (ﷺ) went out and offered the funeral prayers for the martyrs of Uhud, and then went to
the pulpit and said, “I am a predecessor for you and I am a witness for you: and by Allah, I am looking
at my Fount just now, and the keys of the treasures of the earth (or the keys of the earth) have been
given to me: and by Allah, I am not afraid that you will worship others besides Allah after me, but I
am afraid that you will strive and struggle against each other over these treasures of the world.”