Castor and Pollux horse breaker and the boxer / Polydeuces, my brothers" ..." – Helen, "Iliad" 3.253–255), but in the "Odyssey" they are treated as alive even though "the corn-bearing earth holds them". The author describes them as "having honour equal to gods", living on alternate days because of the intervention of Zeus. In both the "Odyssey" and in Hesiod, they are described as the sons of Tyndareus and Leda. In Pindar, Pollux is the son of Zeus while Castor is the son of the mortal Tyndareus. The theme of ambiguous parentage is not unique to Castor and Pollux; similar characterisations appear in
Zeus on Mount Aenos. Although most oracle sites were usually dedicated to Apollo, the heroes, or various goddesses like Themis, a few oracular sites were dedicated to Zeus. In addition, some foreign oracles, such as Baʿal's at Heliopolis, were associated with Zeus in Greek or Jupiter in Latin. The cult of Zeus at Dodona in Epirus, where there is evidence of religious activity from the second millennium BC onward, centered on a sacred oak. When the "Odyssey" was composed (circa 750 BC), divination was done there by barefoot priests called "Selloi", who lay on the ground and observed the rustling of