if any man eat of this bread, he shall live for ever:

But He answered and said, It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God. Matthew 4:4

Thy words were found, and I did eat them; and thy word was unto me the joy and rejoicing of mine heart: for I am called by thy Name, O Lord God of hosts. Jeremiah 15:16

Verily, verily, I say unto you, He that believeth on Me hath everlasting life.  I am that bread of life. John 6:47-48

This is the bread which cometh down from heaven, that a man may eat thereof, and not die.  I am the living bread which came down from heaven: if any man eat of this bread, he shall live for ever: and the bread that I will give is My flesh, which I will give for the life of the world. The Jews therefore strove among themselves, saying, How can this man give us His flesh to eat? Then Jesus said unto them, Verily, verily, I say unto you, Except ye eat the flesh of the Son of man, and drink his blood, ye have no life in you.  Whoso eateth My flesh, and drinketh My blood, hath eternal life; and I will raise him up at the last day. For My flesh is meat indeed, and My blood is drink indeed. He that eateth My flesh, and drinketh My blood, dwelleth in Me, and I in him.  

As the living Father hath sent Me, and I live by the Father: so he that eateth Me, even he shall live by Me. 

This is that bread which came down from heaven: not as your fathers did eat manna, and are dead: he that eateth of this bread shall live for ever. John 6:50-58

Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord.

 But let a man examine himself, and so let him eat of that bread, and drink of that cup.

 For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.

 For this cause many are weak and sickly among you, and many sleep.

For if we would judge ourselves, we should not be judged.

 But when we are judged, we are chastened of the Lord, that we should not be condemned with the world. 1 Corinthians 11:27-32