Tyolus is a being mentioned in the Book of Origin. He taught a message of warning to the people of the low planes (mortals), that they should "seek not wickedness among your neighbors, lest it find purchase in your own house." Dr. Daniel Jackson quoted this reference when the Ori warships demanded that the Milky Way fleet surrender. The cruisers responded by firing their weapons. (SG1: "Camelot")

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