Matthew 15:11
"Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man."
Cross References (ranked by relevance)
There is nothing from without a man, that entering into him can defile him: but the things which come out of him, those are they that defile the man.
For the kingdom of God is not meat and drink; but righteousness, and peace, and joy in the Holy Ghost.
They speak vanity every one with his neighbour: with flattering lips and with a double heart do they speak.
His mouth is full of cursing and deceit and fraud: under his tongue is mischief and vanity.
For meat destroy not the work of God. All things indeed are pure; but it is evil for that man who eateth with offence.
Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.
I know, and am persuaded by the Lord Jesus, that there is nothing unclean of itself: but to him that esteemeth any thing to be unclean, to him it is unclean.
For when they speak great swelling words of vanity, they allure through the lusts of the flesh, through much wantonness, those that were clean escaped from them who live in error.
Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled.
Whom hast thou reproached and blasphemed? and against whom hast thou exalted thy voice, and lifted up thine eyes on high? even against the Holy One of Israel.