Mark 7:18
"And he saith unto them, Are ye so without understanding also? Do ye not perceive, that whatsoever thing from without entereth into the man, it cannot defile him;"
Cross References (ranked by relevance)
Of whom we have many things to say, and hard to be uttered, seeing ye are dull of hearing.
How is it that ye do not understand that I spake it not to you concerning bread, that ye should beware of the leaven of the Pharisees and of the Sadducees?
Then he said unto them, O fools, and slow of heart to believe all that the prophets have spoken:
I have fed you with milk, and not with meat: for hitherto ye were not able to bear it, neither yet now are ye able.
And he said unto them, Know ye not this parable? and how then will ye know all parables?
Jesus answered and said unto him, Art thou a master of Israel, and knowest not these things?