Now I desire to remind you, though you were once for all fully informed, that he who saved a people out of the land of Egypt, afterward destroyed those who did not believe.
Ὑπομνῆσαι δὲ ὑμᾶς βούλομαι, εἰδότας ὑμᾶς ἅπαξ πάντα ὅτι Ἰησοῦς λαὸν ἐκ γῆς Αἰγύπτου σώσας τὸ δεύτερον τοὺς μὴ πιστεύσαντας ἀπώλεσεν,
Haydock Catholic Bible Commentary: Jude
But I will admonish you, that once (that is, some time ago, when you were converted and instructed) knew all things that were necessary as to the Christian faith, I will then put you in mind of the judgments and chastisements that such sinners may expect, that Jesus, not as man, but as God, having saved the people of Israel from their slavery in Egypt, did afterwards on several occasions punish and destroy those among them, who believed not; who were rebellious and incredulous to his promises. Wi. — The Greek, and after it the Protestant version, have the Lord saved; the Vulgate has Jesus, which signifies Saviour, and may in this place be understood of the Word, who from his incarnation took the name of Jesus. V. — Menochius says it means Josue, who is thus styled by the seventy interpreters.