The cult of Seth seems to have originated in Upper Egypt, though he was later identified with foreign gods worshipped in the Eastern Delta. In the Early Dynastic Period, Seth, Lord of Ombos, was the chief god of the eastern desert and its rich gold mines. In the western desert he remained the Lord of the Oases and their vineyards into the Greco-Roman period.
— pg. 192 of Egyptian Mythology: A Guide to the Gods, Goddesses, and Traditions of Ancient Egypt by Geraldine Pinch