question #1 Sahih al-Bukhari 7051, Book 92, Hadith 4 : What warning is given about altering religious teachings after the Prophet’s time?

“I will say those
people are from me. It will be said, ‘You do not know what changes and new things they did after
you.’ Then I will say, ‘Far removed (from mercy), far removed (from mercy), those who changed (the
religion) after me!”