The Hadith of the pond of Khumm (Arabic: غدير خم‎) is an account of a speech given by Muhammad on 18th of Dhu al-Hijjah of 10 AH in the Islamic calendar (March 16, 632 AD) at Ghadir Khumm, which is located near the city of al-Juhfah, in present day Saudi Arabia. It has been interpreted variously by the two main sects of Islam, where Shia generally maintain that in this hadith the Islamic prophet Muhammad appointed Ali (Ali ibn Abi Talib) as his heir and successor. The Sunnis, on the other hand, do not deny Muhammad's declaration about Ali at Ghadir Khumm, but they argue that he was simply urging the audience to hold his cousin and son-in-law in high esteem and affection. Among Sunnis it is primarily used by Sufis to demonstrate the transmission of spiritual authority to Ali.