2 Peter 2:6
If he condemned the cities of Sodom and Gomorrah to extinction by reducing them to ashes, having made them an example to those who were to be ungodly — the reduction to ashes (tephroō) suggests complete annihilation as warning. The exemplary character (hypodeigma) of their destruction is not for entertainment but moral instruction. The cities stand as historical monuments to divine intolerance for persistent ungodliness.