On the Sunday that falls from the 13th to the 19th of the present month, we chant the Service to the 630 Holy and God-bearing Fathers who came together for the 4th Ecumenical Council who assembled in Chalcedon in 451, to condemn Eutyches, who taught that there was only one nature, the divine, in Christ after the Incarnation, and Dioscorus, Patriarch of Alexandria, who illegally received Eutyches back into communion and deposed Saint Flavian, Patriarch of Constantinople, who had excommunicated Eutyches.

In the Slavic tradition, on this Sunday, the Fathers of the first six Ecumenical Councils are all commemorated.

Saint Aquila, who was from Pontus of Asia Minor, was a Jew by race and a tent-maker by trade. In the year 52 he and his wife Priscilla were in Corinth when Saint Paul first came there. They gave him hospitality, and the Apostle remained with them for many days, himself working at the same trade as they (Acts 18:2-3). And having believed in Christ through Paul, they followed him from that time on, working together with him and suffering perils with him for the sake of the preaching of the Gospel, as he himself testifies concerning them in his Epistle to the Romans, saying: "Greet Priscilla and Aquila, my helpers in Christ Jesus: who have for my life laid down their own necks: unto whom not only I give thanks, but also all the churches of the nations" (Rom. 16:3-4). When and where they reposed is unknown.

Saint Joseph was the brother of Saint Theodore the Studite (see Nov. 11). He also is called Studite, especially when he is mentioned together with his brother. According to Codinus, both of them composed the canons of the Triodion during the reign of Leo the Armenian, while in the Church of Saint Romanus (see Nov. 18); he is not to be confused with Saint Joseph the Hymnographer (Apr. 3). When Saint Joseph became Archbishop of Thessalonica, he was exiled thrice because of his godly zeal for the holy icons, suffering many hardships, imprisonments in dark dungeons, hunger, thirst, and every tribulation, in the midst of which he departed unto eternal life in 833.

Saint Julitta was from the city of Iconium. Fearing the persecution of Diocletian, she took her son Cyricus, who was three years old, and departed for Seleucia; but finding the same evil there, she went over to Tarsus in Cilicia, where the ruler arrested her. He took her son from her and tried with flatteries to draw the youth to himself. But the little one, in his childish voice, called on the Name of Christ and kicked the ruler in the belly so hard, that the tyrant became enraged and cast him down the steps of the tribunal. In this manner, the child's head was crushed, and he gave up the spirit. As for his blessed mother, she first endured many torments, and finally was beheaded in the year 296.

Grandson of Saint Olga, Saint Vladimir ascended the throne of Kiev in 980. Though a zealous idolater, he was illumined by the grace of God, accepted the Christian Faith, and completely changed his ways. He was baptized in Cherson in 988, receiving the name Basil; he came forth from the font not only healed of a blindness lately afflicting him, but also from being passionate and warlike, he became meek, peaceable, and exceedingly godly. Whereas his grandmother had refused marriage with the Emperor in Constantinople (see July 11), he married Anna, sister of the Emperors Basil and Constantine, and was accompanied home by priests from Constantinople. Diligently seeking to spread Christianity throughout his realm like a new Constantine, he destroyed the idols (having the chief diety Perun scourged and then cast into the Dnieper River), and summoned all his subjects to Holy Baptism. He reposed in peace in 1015.

This Saint was from Sebastia of Cappadocia and , according to the Synaxaristes, became Bishop of Pidachthoa. He and ten of his disciples were tortured and beheaded by the Governor of Philomarchus in the times of Diocletian. There is a second Martyr Athenogenes commemorated today, mentioned by Saint Basil in Chapter 29 of his treatise "On the Holy Spirit"; it is said that as this Athenogenes approached the fire, wherein he was to die a martyric death, he chanted the hymn O Joyous Light in praise of the Holy Trinity (see also Mar. 11).

This Martyr lived during the reign of Claudius II (268-270). She was from Pisidia of Cilicia and was the only daughter of a certain priest of the idols. On being orphaned by her mother, she was handed over to a certain woman who instructed her in the Faith of Christ. When she was fifteen years old, she was apprehended by the ruler of Olmbrius, and when asked her name, homeland, and faith, she answered: "My name is Marina; I am the offspring of the Pisidia; I call upon the Name of my Lord Jesus Christ." Because of this she endured bonds, imprisonment, and many whippings, and was finally beheaded in the year 270. Saint Marina is especially invoked for deliverance from demonic possession.

This Martyr was from Dorostolum in Thrace, the servant of a certain pagan in the days of Julian the Apostate (361-363). As a fervent Christian, Emilian abominated the error of the pagans, and one day entered the temple and broke all the idols with a hammer. Seeing that others were arrested and beaten for this, he gave himself up of his own accord. He was mercilessly whipped, then cast into a fire, in which he gave up his soul without his body suffering harm.

Saint Macrina, the elder sister of Saints Basil the Great and Gregory of Nyssa, was sought after by many as a bride because of her beauty, wisdom, and illustrious birth, and in tender youth was espoused by her parents to a bridegroom of fitting nobility. When her betrothed died, Macrina refused any other suitors, and devoted herself to a life of virginity, asceticism, and prayer. When her brother Basil returned from a brilliant career in the best schools of Constantinople and Athens, puffed up with not a little youthful pride-for knowledge puffeth up-it was the ardent admonitions and holy example of his blessed sister that persuaded him to turn from seeking worldly glory to the service of God. Saint Macrina founded a convent, where she ended her earthly life in the year 379, and was buried by her brother Gregory, who wrote a moving account of her last days and his grief at seeing such a light pass out of the world.

Saint Dius, who was from Antioch in Syria, later came to Constantinople and established a monastery there, and wrought many wonders. He flourished in the time of Saint Theodosius the Great (379-395).

Elias of great fame was from Thisbe or Thesbe, a town of Galaad (Gilead), beyond the Jordan. He was of priestly lineage, a man of a solitary and ascetical character, clothed in a mantle of sheep skin, and girded about his loins with a leathern belt. His name is interpreted as "Yah is my God." His zeal for the glory of God was compared to fire, and his speech for teaching and rebuke was likened unto a burning lamp. From this too he received the name Zealot. Therefore, set aflame with such zeal, he sternly reproved the impiety and lawlessness of Ahab and his wife Jezebel. He shut up heaven by means of prayer, and it did not rain for three years and six months. Ravens brought him food for his need when, at God's command, he was hiding by the torrent of Horrath. He multiplied the little flour and oil of the poor widow of Sarephtha of Sidon, who had given him hospitality in her home, and when her son died, he raised him up. He brought down fire from Heaven upon Mount Carmel, and it burned up the sacrifice offered to God before all the people of Israel, that they might know the truth. At the torrent of Kisson, he slew 450 false prophets and priests who worshipped idols and led the people astray. He received food wondrously at the hand of an Angel, and being strengthened by this food he walked for forty days and forty nights. He beheld God on Mount Horeb, as far as this is possible for human nature. He foretold the destruction of the house of Ahab, and the death of his son Ohozias; and as for the two captains of fifty that were sent by the king, he burned them for their punishment, bringing fire down from Heaven. He divided the flow of the Jordan, and he and his disciple Elisseus passed through as it were on dry land; and finally, while speaking with him, Elias was suddenly snatched away by a fiery chariot in the year 895 B.C., and he ascended as though into heaven, whither God most certainly translated him alive, as He did Enoch (Gen. 5:24; IV Kings 2: 11). But from thence also, after seven years, by means of an epistle he reproached Joram, the son of Josaphat, as it is written: "And there came a message in writing to him from Elias the Prophet, saying, Thus saith the Lord God of David thy father, Because thou hast not walked in the way," and so forth (II Chron. 21:12). According to the opinion of the majority of the interpreters, this came to pass either through his disciple Elisseus, or through another Prophet when Elias appeared to them, even as he appeared on Mount Tabor to the disciples of Christ (see Aug. 6).