Matthew 15:21 (KJV)

And Jesus said, Are ye also yet without understanding?

Do not ye yet understand, that whatsoever entereth in at the mouth goeth into the belly, and is cast out into the draught?

But those things which proceed out of the mouth come forth from the heart; and they defile the man.

For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:

These are the things which defile a man: but to eat with unwashen hands defileth not a man.

And, behold, a woman of Canaan came out of the same coasts, and cried unto him, saying, Have mercy on me, O Lord, thou son of David; my daughter is grievously vexed with a devil.

But he answered her not a word. And his disciples came and besought him, saying, Send her away; for she crieth after us.

But he answered and said, I am not sent but unto the lost sheep of the house of Israel.

Then came she and worshipped him, saying, Lord, help me.

But he answered and said, It is not meet to take the children's bread, and to cast it to dogs.