As Savior, He delivered, or saved, the Jewish people from Egyptian bondage. This salvation, or deliverance, was a type of the salvation, or deliverance, of the whole human race.
The incarnate Son of God, Jesus Christ, accomplished this deliverance from bondage to sin, death, and the devil.
The liberation of the people from Egyptian bondage is presented throughout the Old and New Testaments as the greatest work of divine mercy.
Yet after accomplishing the great work of His mercy in saving the Israelites from Egypt, the Lord also showed His righteous judgment upon the people.
He destroyed those who did not believe in the Lord on various occasions during the forty-year wandering in the wilderness. Thus only two of those who came out of Egypt entered the promised land: Joshua the son of Nun and Caleb (cf. 1 Cor 10:5-10).
“All this,” the Apostle Paul concludes in the cited passage, “happened to them as types, or examples, and was written for our instruction” (Jude 1:11).
Thus, in the first of the examples he gives, the Apostle Jude reminds his readers of two striking actions of the almighty power of God shown at and after the exodus of the Hebrews from Egypt.
First, there was the salvation, or deliverance, of the whole people from Egyptian bondage. Second, according to the original, there was their destruction because of their unbelief in the Lord.
“Although God, by His surpassing power and according to His oath to their fathers, freed them from Egyptian bondage, when they transgressed the Law He did not leave them unpunished. He gave them their due recompense.
And those who then crossed the Red Sea on dry land later perished for apostasy from the faith” (Theophylact).
Christians must remember both things, for they are examples for their edification and exhortation.
The Apostle takes another example of God’s judgment from the world of the Angels (cf. 2 Pet 2:4 and note). Just as the Lord did not spare those unbelieving people freed from Egyptian bondage, so even earlier He did not spare the Angels who sinned, but keeps them for the great judgment.