At the aposticha, these stichera, in Tone VI: Spec. Mel.: “On the third day…”—

Taking the form of the first man Adam, O Christ, in Thy loving-kindness, Thou didst reveal Thyself as the second Adam, and wast transfigured on Mount Tabor, disclosing Thy divinity, O my Savior.

Troparion of the apostle, in Tone III—

Stichos: Thine are the heavens, and Thine is the earth.

Glory…, Now & ever…: troparion of the feast, in Tone VII—

Beholding Thy transfiguration on the holy mountain, O Christ, the foremost representatives of grace and the law were amazed; and with them we worship Thee and the Father and the divine Spirit.

Stichos: Tabor and Hermon shall rejoice in Thy name.

Creation is manifestly enlightened by Thy transfiguration, O Christ, which, as God, Thou didst show forth on Tabor to the divine apostles, and to Moses and Elijah, ineffably shining more brightly than the sun.

Glory…, in Tone II—

Full of divine zeal, O right wondrous Apostle Matthias, with zeal thou wast zealous for God Almighty, Who hath shown thee to be full of divine miracles; for, possessing strange zeal, thou didst acquire integrity through thine actions. Wherefore, dwelling with the heavenly choirs in the highest, pray thou to the Word, Christ our God, O beholder of God, that He grant us great mercy.

Now & ever…, in the same tone—

O Christ God Who wast transfigured on Mount Tabor, showing the glory of Thy divinity to Thy disciples, illumine us all with the light of the knowledge of Thee, and guide us on the path of Thy commandments, as Thou alone art good and lovest mankind.

O holy Apostle Matthias, entreat the merciful God, that He grant to our souls remission of transgressions.

Thou wast transfigured on the mountain, O Christ God, Who didst show Thy glory unto Thy disciples as far as they could bear it. May Thine everlasting light shine forth also upon us sinners through the prayers of the Theotokos. O Bestower of light, glory be to Thee!