Since Thou hast given us the miracles of Thy holy Martyrs as an invincible battlement, by their entreaties scatter the counsels of the heathen, O Christ our God, and strenghten the faith of Orthodox Christians, since Thou alone art good and the Friend of man.

Cyrus and John the Unmercenaries

Reading from the Synaxarion:

These Saints lived during the years of Diocletian. Saint Cyrus was from
Alexandria, and Saint John was from Edessa of Mesopotamia. Because of the
persecution of that time, Cyrus fled to the Gulf of Arabia, where there was a
small community of monks. John, who was a soldier, heard of Cyrus' fame
and came to join him. Henceforth, they passed their life working
every virtue, and healing every illness and disease freely by the grace
of Christ; hence their title of "Unmercenaries." They heard that a
certain woman, named Athanasia, had been apprehended together with her
three daughters, Theodora, Theoctiste, and Eudoxia, and taken to the
tribunal for their confession of the Faith. Fearing lest the tender young
maidens be terrified by the torments and renounce Christ, they went to
strengthen them in their contest in martyrdom; therefore they too were
seized. After Cyrus and John and those sacred women had been greatly
tormented, all were beheaded in the year 292. Their tomb became a renowned
shrine in Egypt, and a place of universal pilgrimage. It was found in
the area of the modern day resort near Alexandria named Abu Kyr.

Apolytikion in the Plagal of the Fourth Tone
Since Thou hast given us the miracles of Thy holy Martyrs as an
invincible battlement, by their entreaties scatter the counsels of the
heathen, O Christ our God, and strenghten the faith of Orthodox
Christians, since Thou alone art good and the Friend of man.