Metamorphoses Book 13: The Pilgrimage of Aeneas
Aeneas and a few other Trojan men escaped the city and set sail for a new land where they hoped to build a new Troy. They stopped at Delos and King Anius welcomed them. He told them how his son had gone to found Andros and his daughters had been given a gift that allowed them to turn all they touched to corn, wine, or palm oil. Agamemnon had kidnapped them and they escaped to their brother's island. But when Agamemnon threatened Anius' son with war, he turned his sisters over to the Greek. The girls asked Bacchus for help, and he made them doves.
The next day Aeneas went to Apollo's oracle and was told to "seek / Their ancient mother and ancestral shores." Book 13 -- The Pilgrimage of Aeneas, line 376-77 So Aeneas and his men set out for Italy and their next stop was a land near Scylla, a man-eating monster, and Charybdis, a whirlpool.
Scylla had once been a beautiful girl pursued by many suitors before she was transformed to a monster. She'd been friends with the sea-nymph, Galatea. Galatea had told Scylla all about her problems with Polyphemus, the Cyclops.