This Saint was a soldier from Alexandria. He came with the Roman fleet to Chios, where he was betrayed as a Christian to Numerian, Commander of the Fleet. Because he boldly pro-fessed himself to worship Christ as God and refused to worship any other, he was tormented and beheaded in 251, during the reign of Decius.
Apolytikion in the Fourth Tone
Thy Martyr, O Lord, in his courageous contest for Thee received the prize of the crowns of incorruption and life from Thee, our immortal God. For since he possessed Thy strength, he cast down the tyrants and wholly destroyed the demons' strengthless presumption. O Christ God, by his prayers, save our souls, since Thou art merciful.
Kontakion in the Fourth Tone
In thy holy prayers to God, thou hast shone brightly, a great guide for all the world. Wherefore, we praise thee on this day, O Saint, thou Martyr of godly mind and boast of Chios, O glorious Isidore.