7:5 Then the Pharisees and scribes asked him, Why walk not thy disciples according to the tradition of the elders, but eat bread with unwashen hands?
7:7 Howbeit in vain do they worship me, teaching for doctrines the commandments of men.
i.e. the so-called "oral law" alleged to have been handed down from Moses; really a traditional interpretation of the written law.
See margin ref., (See Scofield "Mark 7:7")
7:11 But ye say, If a man shall say to his father or mother, It is Corban, that is to say, a gift, by whatsoever thou mightest be profited by me; he shall be free.
7:19 Because it entereth not into his heart, but into the belly, and goeth out into the draught, purging all meats?
Or, I have dedicated to God that which would relieve your need; Mark 7:12 .
7:26 The woman was a Greek, a Syrophenician by nation; and she besought him that he would cast forth the devil out of her daughter.
Because it entereth
Because it does not enter into the heart of him, but into the bowels is passed -- purifying all the food.
7:28 And she answered and said unto him, Yes, Lord: yet the dogs under the table eat of the children's crumbs.
(See Scofield "Matthew 15:21")