The six sons of Pterelaus, King of the Taphians, descended from Electryon's brother Mestor came to Mycenae to claim a share of kingdom. When Electryon spurned their request, they drove off his cattle; Electryon's sons battled against them, and all but Licymnius (on one side) and Everes (on the other) died. Everes sold the cattle to Polyxenus of Elis. Amphitryon, Electryon's nephew and promised in marriage to Alcmene, bought the cattle and returned them to his uncle, but accidentally killed him as he threw his club at one of the cows. However, there is an earlier tradition that Amphitryon killed him in a fit of anger over some cattle.[5] Electryon's brother Sthenelus seized the throne of Mycenae, charged Amphitryon with murder, and sent him into exile.
^Morford, Mark P. O.; Lenardon, Robert J.; Sham, Michael (2015). Classical Mythology (International 10th ed.). Oxford: Oxford University Press. p. I-24. ISBN978-0-19-999739-8.