Ghadir Al-Khumm (Arabic غدیر الخم "Pond of Khumm", Persianized Ghadir(-e) Khum, or Khom) is a location in the Wadi Rabigh mentioned in the Hadith of the pond of Khumm.
It was a pond or marsh formed by a spring in the wadi, located to the east of the road from Medina to Mecca, three (according to other sources two) Arab miles (roughly 4 to 6 km) from Al-Johfa (modern Rabigh), roughly 180 km from both Mecca and Medina, at ca. 22°49′30″N 39°4′30″E / 22.825°N 39.075°E / 22.825; 39.075. The Arab geographers mention the thick trees that surround it and the Mosque of the Prophet lying between it and the spring.
It was situated on the Incense Route between Syria and Yemen where travelers could replenish their resources of water in the most arid part of Arabia between Mecca and Medina.
It is historically famous for an event, in which Muhammad said, what is known as the Hadith of the pond of Khumm, equally accepted by both Sunni and Shia Muslims. Muhammad is reported to have pronounced Ali ibn Abi Talib the mawla (patron, master) of those for whom Muhammad was patron. Shia Muslims celebrate this announcement each year as Eid al-Ghadeer.
Read more about this topic: Wadi Rabigh