Theotokos and Elizabeth by St. Cyril of Alexandria.

Similarly, she was addressed by the mother of the blessed Baptist, Who was moved by the Holy Spirit: “For Elizabeth, it says, was filled with the Holy Spirit and cried: Blessed are you among women, and blessed is the fruit of your womb; why has it happened to me that the Mother of my Lord should come to me” (Luke 1:41 -43). Who is so insane as not to want to call with the Scriptures the holy Virgin Theotokos? Let them not, therefore, disturb the hearing of those
of greater integrity by speaking about a child and a baby lest little by little, they reject the whole event of his advent. For he had been called by the angel both baby and Lord.

Cyril of Alexandria,
Against those who are unwilling to confess that the Holy Virgin is Theotokos 23.