Theodore of Mopsuestia, on Heb 7:3

“Without father, without mother, without genealogy, having neither beginning of days nor end of life, but likened unto the Son of God, continueth a priest for ever.”

“God the Word was not generated from a woman; the one generated from a woman was the one fashioned in her by the power of the Holy Spirit. The one who is of one essence with the Father was not born from her womb, for he is "without mother," as blessed Paul's phrase has it. It was rather the one fashioned in his mother's womb by the power of the Holy Spirit who came in the last times. For this reason he is also called "without father."”

Imported from an open dataset — not yet checked against the printed edition.