Erastus, Olympas, Rodion, Sosipater, Quartus, Apostles of the 70
Of these Saints, Olympas and Rodion became disciples of Peter, the chief Apostle, and came to Rome, where they were beheaded by Nero. The others reposed in peace, having become bishops: Sosipater of Iconium, Quartus of Beirut, and Erastus of Paneas, or Paneias (which was also called Caesarea of Philippi); Saint Erastus had been chamberlain of the city of Corinth (Rom.16:23).
Apolytikion of Olympas & Companions of the 70 in the Third Tone
O Holy Apostles, intercede to our merciful God, that He may grant our souls forgiveness of sins.
Kontakion of Olympas & Companions of the 70 in the Fourth Tone
The most solemn festival of the Apostles hath this day appeared to us and manifestly doth bestow divine forgiveness of trespasses on all that faithfully keep their memorial.