2 Peter 2:22

Revised Standard Version (RSV-CI)

It has happened to them according to the true proverb, The dog turns back to his own vomit, and the sow is washed only to wallow in the mire.

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Like a dog that returns to his vomit is a fool that repeats his folly.

“If the disease breaks out again in the house, after he has taken out the stones and scraped the house and plastered it,

This figure Jesus used with them, but they did not understand what he was saying to them.