Petrus
From The Stargate Omnipedia
Mythical figure found in the Book of Origin, the foundation of belief for followers of Origin and the Ori. In a time of need Petrus spoke to a rock, not with his lips, but his mind, and the rock wept tears of fresh water until his thirst was quenched.
KEY EPISODE
Origin - A Prior of the Ori recites the parable of Petrus.