Matthew 15:16-20
(16) And Jesus said, Are ye also yet without understanding?
(17) Do not ye yet understand, that whatsoever entereth in at the mouth goeth into the belly, and is cast out into the draught?
(18) But those things which proceed out of the mouth come forth from the heart; and they defile the man.
(19) For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:
(20) These are the things which defile a man: but to eat with unwashen hands defileth not a man.
Mark 7:2-5
(2) And when they saw some of his disciples eat bread with defiled, that is to say, with unwashen, hands, they found fault.
(3) For the Pharisees, and all the Jews, except they wash their hands oft, eat not, holding the tradition of the elders.
(4) And when they come from the market, except they wash, they eat not. And many other things there be, which they have received to hold, as the washing of cups, and pots, brasen vessels, and of tables.
(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?
Genesis 1:29
(29) And God said, Behold, I have given you every herb bearing seed, which is upon the face of all the earth, and every tree, in the which is the fruit of a tree yielding seed; to you it shall be for meat.
This is talking about food eaten during the ceremonial feasts, Jesus put an end to the ceremonial feasts.
Daniel 9:27
(27) And he shall confirm the covenant with many for one week: and in the midst of the week he shall cause the sacrifice and the oblation to cease, and for the overspreading of abominations he shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate.