Greek Bible Art: The Annunciation

The image shows The Annunciation by Fra Angelico (source). This verse is from Rev. 22:13.

ἐγὼ τὸ ἄλφα καὶ τὸ ὦ, ὁ πρῶτος καὶ ὁ ἔσχατος.
Ego sum alpha et omega, primus et novissimus.
I am Alpha and Omega, the beginning and the end.