Mark 1:3

Pseudo-Gregory Thaumaturgus Fourth Homily

I cannot keep silence while Thou art present, for I am a voice; yea, I am the voice, as it is said, of one crying in the wilderness, Prepare ye the way of the Lord.[9]

Victorinus Commentary on the Apocalypse of the Blessed John

Mark, therefore, as an evangelist thus beginning, "The beginning of the Gospel of Jesus Christ, as it is written in Isaiah the prophet; "[24]