Cyril of Alexandria, on Exod 14:20

“Stood behind, between the Egyptians’ camp and the camp of Israel: and it was a dark cloud, and enlightening the night, so that they could not come at one another all the night.”

“And it is written also in Exodus that when the ruler of the land of the Egyptians with his warriors was pursuing after the Israelites and was already upon the point of engaging with them in battle, the angel of God stood between the camp of the Israelites and of the Egyptians, and the one came not near the other all the night. There is therefore nothing unbefitting in supposing here also that the holy angel who was the guardian of the synagogue offered supplications in its behalf and prayed for a respite, if perchance yielding to better influence it might yet bring forth fruit.”

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