"Look out for the dogs, look out for the evil-workers, look out for those who mutilate the flesh. For we are the true circumcision, who worship God in spirit, and glory in Christ Jesus, and put no confidence in the flesh."
-- Philippians 3:2f.
"Do not give dogs what is holy; and do not throw your pearls before swine, lest they trample them under foot and turn to attack you."
-- Matthew 7:6