Asopus (Ancient Greek: Ἀσωπός) is the name of several rivers in Greece and of the river-gods who personify them. In myth Zeus carried off Asopus's daughter Aegina; Sisyphus revealed the abductor's identity in return for a perennial fountain at Corinth, and Asopus pursued Zeus until driven back by the god's thunderbolt. Tradition confounds the Boeotian and Phliasian Asopus rivers and their many eponymous daughters.
Adapted from Wikipedia, "Asopus" · CC BY-SA 4.0
I.Mythology
As mythological entities, the Boeotian river Asopus and the Phliasian river Asopus are much confounded. They are duplicated a second time as supposed mortal kings who gave their names to the corresponding rivers.
The Bibliotheca informs that the river Asopus was a son of Oceanus and Tethys or, according to Acusilaus, of Poseidon by Pero, or according to yet others of Zeus by Eurynome; it is uncertain whether the compiler knows there is more than one river named Asopus.
II.Phliasian Asopus
Pausanias writes that during the reign of Aras, the first earth-born king of Sicyonian land, Asopus — said to be son of Poseidon by Celusa — discovered for him the river called Asopus and gave it his name. Diodorus Siculus similarly presents Asopus (here son of Oceanus and Tethys) as a settler in Phlius and husband of Metope, daughter of Ladon.
Pausanias mentions his daughter Nemea, eponym for the region of the same name. Pausanias and Diodorus also mention a daughter Harpina and state that according to the traditions of the Eleans and Phliasians, Ares lay with her in Pisa and they had a son, Oenomaus.
III.Daughters and the abduction of Aegina
In Pindar's odes the sisters Aegina and Thebe appear as daughters of Boeotian Asopus by Metope. Both are abducted by Zeus — one carried to the island later named Aegina, the other to Thebes. Corinna lists nine daughters of Boeotian Asopus abducted by Zeus, Poseidon, Apollo, and Hermes.
Later texts mostly indicate Zeus' abduction of Aegina. Asopus chases after Zeus until the god strikes him with a thunderbolt, whence ever after Asopus is lame and flows very slowly. In these tales Asopus discovers the truth from Sisyphus, king of Corinth, in return for creating a spring on the Corinthian Acropolis.