1 Corinthians 15:32-34
What benefit was it to me, from a human standpoint, if I fought wild animals in Ephesus, and [yet] the dead are not raised? [Note: This probably refers to Paul facing ferocious opposition from people there in Ephesus]. We should [just] eat and drink, for tomorrow we [may] die.
Ephesians 4:19
They have stopped caring [i.e., about morality], so God has abandoned them to lives of unrestrained indecency and to engage in all kinds of [moral] impurity, with a constant desire for more.
2 Peter 2:22
It has happened to them like the true proverb [says], "The dog [throws up, and then] goes back and eats its own vomit," and "The hog that was all cleaned up [goes back] to wallowing in the mud."