Irmos: The Angel caused the furnace to pour forth dew upon the pious youths, and the command of God, which consumed the Chaldæans, prevailed upon the tyrant to cry out: Blessed art Thou, O God of our fathers!
Having shone forth like an all-radiant sun among the choir of monastics, O father, with the splendors of thine instructions, as with rays, thou dost illumine all who cry out with faith: Blessed is the God of our fathers!
Theotokion: Thy conception was beyond description, O Bride of God, for thou gavest birth to the Word of God Who hath delivered all men from irrationality and granteth them the words to cry: Blessed art Thou, O God of our fathers!
Thou wast shown to be a most excellent giver of laws for monastics, O all-honored one, and one who rescueth them from all the machinations of the enemy. Wherefore, O blessed one, they honor thine honored and sacred memory on earth.
Irmos: Once, in Babylon, the fire stood in awe of the condescension of God; wherefore, the youths, dancing with joyous step in the furnace, as in a meadow, chanted: Blessed art Thou, O God of our fathers!
O father, the honorable choir of monks knoweth thee as a divinely-wise describer and guide to the higher life, and as is fitting it celebrateth thy memory, O wise father Isaac, thou rule of hesychasts.
Theotokion: With the rich streams of thy mercy purify my heart, which hath been defiled by the passions of the enemy, O Maiden; and dispel the darkness of my mind, that I may gaze upon the Light which shone forth from thee.
Thou wast an excellent instrument of the Spirit, ever sounding forth thine inspirations and playing the saving hymn of repentance for us who hymn thee, O ever-memorable one.
Caught up by the Spirit to the sight of mystic visions and mysteries of higher glory, which pass understanding, and deified by partaking thereof, thou didst cry out: Blessed is the God of our fathers!
Translated by Isaac Lambertsen. Edition menaion.en.lambertsen.