And she brought forth her firstborn son, and wrapped him in swaddling clothes, and laid him in a manger; because there was no room for them in the inn.
All Commentaries on Luke 2:7 Go To Luke 2
Hippolytus of Rome
AD 235
And if you please, we say that the Word was the first-born of God, who came down from heaven to the blessed Mary, and was made a first-born man in her womb, in order that the first-born of God might be manifested in union with a first-born man.