John 6:53-55
So, Jesus answered them, "Truly, truly, I tell you, unless you eat the physical body of the Son of man and drink His blood, you do not have [spiritual] life in yourselves [Note: The references to "body" and "blood" throughout this section allude to taking Jesus' life and teaching into one's heart. See verse 56].
1 Corinthians 11:24
and after giving thanks [for it], He broke it [in pieces] and said, "This represents my [physical] body, which is [to be given] for you. [Continue to] do this in memory of me."
1 Corinthians 11:26
For whenever you eat this bread and drink from this cup, you are proclaiming the Lord's death until He comes [again].