2 Peter 2:6

and reducing the cities of Sodom and Gomorrah to ashes, condemned them to final destruction, making them an example for all who in future should live ungodly;

1 Corinthians 10:6-10

Now these things were examples for us, that we might not be coveters of evil things, as they also coveted.

Jude 1:7

As Sodom and Gomorrha and the surrounding cities, in like manner with them abandoned to whoredom, and going after other flesh, are set forth an example, suffering the judicial punishment of eternal fire.

Treasury of Scripture Knowledge

Summary

And the earth opened her mouth, and swallowed them up together with Korah, when that company died, what time the fire devoured two hundred and fifty men: and they became a sign.

Bible References

They became a sign

1 Corinthians 10:6
Now these things were examples for us, that we might not be coveters of evil things, as they also coveted.
2 Peter 2:6
and reducing the cities of Sodom and Gomorrah to ashes, condemned them to final destruction, making them an example for all who in future should live ungodly;
Jude 1:7
As Sodom and Gomorrha and the surrounding cities, in like manner with them abandoned to whoredom, and going after other flesh, are set forth an example, suffering the judicial punishment of eternal fire.