2 Peter 2:6

πόλεις Σοδ. καὶ Γομορρ. Not genitive of apposition, but cities of the district, where Sodom and Gomorrah were situated. cf. Jude 1:7. Σ. καὶ Γ. καὶ αἱ περὶ αὐτὰς πόλεις καταστροφῇ κατέκρινεν. καταστροφῇ is dative of instrument, “condemned them by overthrow”. Genesis 19:24-25 seems to imply some further destruction after the fire. Perhaps an earthquake is meant, a common accompanying phenomenon of volcanic disturbance. ὑπόδειγμα … τεθεικώς, “constituting them an example to ungodly persons of things in store for them.” With μελλ. cf. Hebrews 11:20; Colossians 2:17. τεφρώσας = “cover up with ashes” (not “reduce to ashes”) found in a description of the eruption of Vesuvius. (Dio. Cass. lxvi. p. 1094).