the followers of Shiaism believe that there were many imams after Hazrat Ali (R.A) and they associate different narrations to different imams of different times and follow/practice those acts attributed to different those imams by labeling that as it was narrated by their imam therefore it is a part of Islam. In the light of Quran, is there any ayah that guides us in this matter? Please guide. May Allah grant us all hidayat and prevent us from any kind of alterations in Islam. JazakAllah