Alexander (2.6-3.1)

Now Olympias, who affected these divine possessions more zealously than other women, and carried out these divine inspirations in wilder fashion, used to provide the revelling companies with great tame serpents, which would often lift their heads from out the ivy and the mystic winnowing-baskets,[*] or coil themselves about the wands and garlands of the women, thus terrifying the men.

However, after his vision, as we are told, Philip sent Chaeron of Megalopolis to Delphi, by whom an oracle was brought him from Apollo, who bade him sacrifice to Ammon and hold that god in greatest reverence, but told him he was to lose that one of his eyes which he had applied to the chink in the door when he espied the god, in the form of a serpent, sharing the couch of his wife.