The cities of Sodom and Gomorrha; which being the chief of the five, include Admah and Zeboim, Zoar, the fifth, being spared for Lot's sake, Genesis 14:18, compared with Genesis 19:25. Condemned them with an overthrow; i.e. punished them with a total subversion, or brought that destruction upon them to which he had condemned them. Making them an ensample unto those that after should live ungodly; of his wrath and vengeance ready to be poured out upon others that should live ungodly, to deter them from the imitation of the sins of those that had so miserably perished. The word may be rendered a type, (as it is, Hebrews 8:5, and Hebrews 9:23), viz. of hell-fire, which is to be the punishment of wicked men at the last day: Judges 1:7 implies as much. As the deliverance of the Israelites out of Egypt was a kind of type of the deliverance of all God's people to the end of the world; so the subversion of these cities was so memorable an instance of Divine vengeance, that the Scripture frequently alludes to it, as a type or pattern, when it speaks of the general destruction of the wicked of the world.
Related Commentaries of 2 Peter 2:6
2 Peter 2:6
6 And turning the cities of Sodom and Gomorrha into ashes condemned them with an overthrow, making them an ensample unto those that after should live ungodly;