John 6: 48-68
48 I am the bread of life.
49 Your ancestors ate the manna in the desert, but they died;
50 this is the bread that comes down from heaven so that one may eat it and not die.
51 I am the living bread that came down from heaven; whoever eats this bread will live forever; and the bread that I will give is my flesh for the life of the world."
52 The Jews quarreled among themselves, saying, “How can this man give us (his) flesh to eat?”
53 Jesus said to them, “Amen, amen, I say to you, unless you eat the flesh of the Son of Man and drink his blood, you do not have life within you.
54 Whoever eats my flesh and drinks my blood has eternal life, and I will raise him on the last day.
55 For my flesh is true food, and my blood is true drink.
56 Whoever eats my flesh and drinks my blood remains in me and I in him.
57 Just as the living Father sent me and I have life because of the Father, so also the one who feeds on me will have life because of me.
58 This is the bread that came down from heaven. Unlike your ancestors who ate and still died, whoever eats this bread will live forever.”
59 These things he said while teaching in the synagogue in Capernaum.
60 Then many of his disciples who were listening said, “This saying is hard; who can accept it?”
61 Since Jesus knew that his disciples were murmuring about this, he said to them, “Does this shock you?
62 What if you were to see the Son of Man ascending to where he was before? 21
63 It is the spirit that gives life, while the flesh is of no avail. The words I have spoken to you are spirit and life.
64 But there are some of you who do not believe.” Jesus knew from the beginning the ones who would not believe and the one who would betray him.
65 And he said, “For this reason I have told you that no one can come to me unless it is granted him by my Father.”
66 As a result of this, many (of) his disciples returned to their former way of life and no longer accompanied him.
67 Jesus then said to the Twelve, “Do you also want to leave?”
68 Simon Peter answered him, "Master, to whom shall we go? You have the words of eternal life.
Matthew 26: 26-28
26 While they were eating, Jesus took bread, said the blessing, broke it, and giving it to his disciples said, “Take and eat; this is my body.”
27 Then he took a cup, gave thanks, 16 and gave it to them, saying, "Drink from it, all of you,
28 for this is my blood of the covenant, which will be shed on behalf of many for the forgiveness of sins.
Mark 14:22-24
22 While they were eating, he took bread, said the blessing, broke it, and gave it to them, and said, “Take it; this is my body.”
23 Then he took a cup, gave thanks, and gave it to them, and they all drank from it.
24 He said to them, "This is my blood of the covenant, which will be shed for many
Luke 22:19-20
19 Then he took the bread, said the blessing, broke it, and gave it to them, saying, “This is my body, which will be given for you; do this in memory of me.”
20 And likewise the cup after they had eaten, saying, "This cup is the new covenant in my blood, which will be shed for you.
1Corinthians 11: 23-30
23 For I received from the Lord what I also handed on to you, that the Lord Jesus, on the night he was handed over, took bread,
24 and, after he had given thanks, broke it and said, “This is my body that is for you. Do this in remembrance of me.”
25 In the same way also the cup, after supper, saying, “This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.”
26 For as often as you eat this bread and drink the cup, you proclaim the death of the Lord until he comes.
27 Therefore whoever eats the bread or drinks the cup of the Lord unworthily will have to answer for the body and blood of the Lord.
28 A person should examine himself, and so eat the bread and drink the cup.
29 For anyone who eats and drinks without discerning the body, eats and drinks judgment on himself.
30 That is why many among you are ill and infirm, and a considerable number are dying
Notice how 5 different New testament Authors all understood Christ as saying the same words. This is my Body, this is my Blood…