Original sentence: According to Shi'a scholars, before Muhammad died he had received a divine command to appoint Ali as his successor.He publicly announced Ali's succession at the resting-place of Ghadir Khum, between Mecca and Medina, to a large number of Muslims who had accompanied him on what was to be his last pilgrimage to Mecca
Edited sentence: (see here for detailed list of Shi'a reasonings.Shi'as believe Muhammad appointed his successor clearly and on various occasions.The most famous, according to Shi'a scholars, is the public announcement of Ali's succession at the resting-place of Ghadir Khum, between Mecca and Medina, to a large number of Muslims who had accompanied him on what was to be his last pilgrimage to Mecca