Greek

Καὶ ἀποκριθεὶς ὁ ἄγγελος εἶπεν αὐτῇ Πνεῦμα Ἅγιον ἐπελεύσεται ἐπὶ σέ καὶ δύναμις Ὑψίστου ἐπισκιάσει σοι διὸ τὸ γεννώμενον ἅγιον κληθήσεται Υἱὸς Θεοῦ

Transliterated

kai apokritheis ho angelos eipen autē Pneuma Hagion epeleusetai epi se kai dynamis Hypsistou episkiasei soi dio to gennōmenon hagion klēthēsetai Huios Theou

Literal English

And He answering - an angel said on her Spirit Holy will come at You And power of [the] Most High will overshadow to You Therefore the being born holy will be called Son of God
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