The holy Apostles Sosipater (April 28), Erastus, Quartus and Tertius (October 30) were disciples of Saint Paul.
Saint Sosipater, a native of Achaia, was Bishop of Iconium, where also he died. Saint Paul mentions him in Romans 16:21.
Troparion — Tone 3
Holy Apostles, Erastus, Olympas, Herodion, Sosipater, Quartus and Tertius, / entreat the merciful God, / to grant our souls forgiveness of transgressions.
Kontakion — Tone 2
Illumined by divine light, O holy apostles, / you wisely destroyed the works of idolatry. / When you caught all the pagans you brought them to the Master / and taught them to glorify the Trinity.