The Sacred Scriptures was a document that was read on the world of Onyius II.
It was a holy item amongst the Omegan species and stated that the Alphans were created after them. The Scriptures stated that the Omegan race were born in the light and commanded them to shun that which dwelled in the darkness. This led to a long standing enimity between the two races.
Prefect Azrah of the Omegans informed the crew of the USS Enterprise in the 2260s about the Sacred Scriptures as being the reason for their desire to destroy the Alphans. (TOS video game: Judgment Rites)