Ovid,
The Metamorphoses of Ovid, Books I-VII
“ Jupiter, with the surname of Ammon, had a temple in the deserts of Libya, where he was worshipped under the shape of a ram; a form which he was supposed to have assumed, when, in common with the other Deities, he fled from the attacks of the Giants. The oracle of Jupiter Ammon being consulted relative to the sea monster, which Neptune, at the request of the Nereids, had sent against the Ethiopians, answered that Andromeda must be exposed to be devoured by it; which Ovid here, not without reason, calls an unjust demand. ”
