Theophylact of Ohrid

Having spoken about the debauchery of the impious Nicolaitans, Valentinians, and Marcionites, he adds also that the Lord delivered the people from the land of Egypt, and so on. By this he shows that the Founder of the Old and New Testaments is one and the same God, and not as those vile ones say, that one God, wrathful and cruel, gave the Old Testament, and another God, without wrath and loving of mankind, gave the New Testament. …

Commentary on Jude ↗

Oecumenius

I want to remind you, when we know once that the Lord, after He had saved the people from Egypt, again destroyed those who did not believe: and that He kept the angels who did not keep their own position, but left their own dwelling, in eternal chains under darkness for the judgment of the great day. Just as Sodom and Gomorrah and the neighboring cities, which were similarly defiled with them through sexual immorality and pursued strange flesh, are set forth as an example, suffering the punishment of eternal fire. …

Commentary on Jude ↗

Clement of Alexandria

"For the Lord God," he says, "who once delivered a people out of Egypt, afterward destroyed them that believed not;" that is, that He might train them through punishment. For they were indeed punished, and they perished on account of those that are saved, until they turn to the Lord.

From the Latin Translation of Cassiodorus ↗

Bede

Because Jesus, saving the people from the land of Egypt, etc., he calls Jesus not the son of Nave, but our Lord, showing first that he did not have his beginning from the birth of the holy Virgin, as the heretics affirm, but according to the mystery of his name, he has existed as the eternal God for the salvation of believers; then indicating that in the same way he mercifully saves believers, he also justly condemns the unbelievers. …

Commentary on the Catholic Epistles ↗