1 Corinthians 8:7
However, that knowledge isn't in all men. But some, with consciousness of the idol until now, eat as of a thing sacrificed to an idol, and their conscience, being weak, is defiled.
looking carefully lest there be any man who falls short of the grace of God; lest any root of bitterness springing up trouble you, and many be defiled by it;
Yet in the same way, these also in their dreaming defile the flesh, despise authority, and slander celestial beings.
Now when they saw some of his disciples eating bread with defiled, that is, unwashed, hands, they found fault.