Irmos of the ninth ode of the Canon at Matins for the feast of the Nativity in the Flesh of Our Lord, God and Savior Jesus Christ, called Christmas, Dec. 25/Jan. 7. Tone 1 (Galician)
Found in the Anthology pp. 760-761
lyrics
O my soul, magnify Christ the King born in a manger.
A strange and glorious mystery do I behold: the cave is heaven; the Virgin, the throne of the cherubim; the manger, a dwelling place in which is laid Christ, the God Whom nothing can contain. Singing His praises, we magnify Him.