Cyril of Alexandria, on Heb 13:8

“Jesus Christ, yesterday, and today; and the same for ever.”

“How then could he be the same in the past when he had not yet assumed generation according to the flesh?… It is of Jesus Christ and not just of the Word that the text affirms that he is the same today, yesterday and forever, but how could the human nature possess immutability and unaltered identity when it is subject to movement and, above all, to that movement that made it pass from nothingness to being and to life?… In virtue of the union with flesh that is proper to him, it is still he himself who is described as existing yesterday and as preexistent.”

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