Stephanos of Byzantium - Ethnika
Koropē, a city of Thessaly. The citizen is called Koropaios. Nicander in the Thēriaka: “where Apollo the Koropaios established oracles and an ordinance for men.” But those who wrote commentaries on him—Theon and Plutarch and Demetrius of Phalerum—say: “Nicander Apollo of Oropos and of Koropē. He does not know that it is a sanctuary of Amphiaraus, not of Apollo. And ‘Oropaios’ is said by omission of the kappa.” Koropē, however, is a city of Thessaly. It is better to suppose that he has made a mistake; and one also writes Oropaios. For Oropē is a city of Euboea, where there is a very famous sanctuary of Apollo.”
Stephanos excerpt (left) is aligned with matched Herodian passages (right). Colors indicate corresponding overlap spans.