Luke.4.23  And he said to them, "Doubtless you will quote to me this proverb, `Physician, heal yourself; what we have heard you did at Capernaum, do here also in your own country.'"
2Pet.2.22  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.

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.