Wadi Musa means Valley of Moses in Arabic (وادي موسى). It is said that the prophet Moses passed through the valley and struck water from the rock for his followers at the site of Ain Musa (Moses's water spring or Moses's Well). The Nabateans built channels that carried water from this spring to the city of Petra. Wadi Musa was also nicknamed the Guardian of Petra. The Tomb of Aaron, supposed burial site of the Biblical Aaron, the brother of Moses, is on nearby Mount Hor.