Charles Ellicott Commentary 2 Peter 2:6

"and turning the cities of Sodom and Gomorrah into ashes condemned them with an overthrow, having made them an example unto those that should live ungodly;" — 2 Peter 2:6 (ASV)

And turning. . . .—The construction still depends on the “if” in 2 Peter 2:4. (See Note on Jude 1:7.)

Condemned them with an overthrow.—Or, perhaps, to an overthrow, like condemn to death in Matthew 20:18. The very word here used for “overthrow”—catastrophe—is used by the LXX. of the overthrow of these cities (Genesis 19:29); in the New Testament it occurs in 2 Timothy 2:4 only.

An ensample unto those.—Literally, an ensample of those—i.e., of the punishment which such sinners must expect. (Compare Are set forth for an example,Jude 1:7.)