In a number of sahih hadith, Muhammad predicted that Islam would go back to where it started:
Allah's Apostle said, "Verily, Belief returns and goes back to Medina as a snake returns and goes back to its hole (when in danger)."
http://hadithcollection.com/sahihmuslim/Sahih%20Muslim%20Book%2001.%20Faith/sahih-muslim-book-001-hadith-number-0271.html
https://sunnah.com/mishkat:159#:~:text=Mishkat%20al-Masabih%20159%20He%20also%20reported%20God%E2%80%99s%20messenger,few%20%5Bwho%20hold%20to%20it%5D%27%20Muslim%20transmitted%20it.
Why do muslims not believe their prophet?
Allah's Apostle said, "Verily, Belief returns and goes back to Medina as a snake returns and goes back to its hole (when in danger)."
http://hadithcollection.com/sahihmuslim/Sahih%20Muslim%20Book%2001.%20Faith/sahih-muslim-book-001-hadith-number-0271.html
https://sunnah.com/mishkat:159#:~:text=Mishkat%20al-Masabih%20159%20He%20also%20reported%20God%E2%80%99s%20messenger,few%20%5Bwho%20hold%20to%20it%5D%27%20Muslim%20transmitted%20it.
Why do muslims not believe their prophet?