History of the Peloponnesian War

Now the strait is that arm of the sea between Rhegium and Messene, at the point where Sicily is nearest the mainland; and it is the Charybdis, so called, through which Odysseus is said to have sailed. On account of its narrowness and because the water falls into it from two great seas, the Etruscan and the Sicilian, and is full of currents, it has naturally been considered dangerous.

Now it was in this strait that the Syracusans and their allieswere compelled one day toward evening to fight for a vessel which was making the passage; and with thirty odd ships they put out against sixteen Athenian and eight Rhegian ships.