Ghadir Khumm

The event of Ghadir Khumm (Arabic: حديث الغدير; Persian: رویداد غدیر خم) occurred in March 632. While returning from the Farewell Pilgrimage, the Islamic prophet Muhammad gathered all the Muslims who were with him and gave a long sermon. In the sermon, Muhammad announced that Ali ibn Abi Talib would be his successor.