John 6:53-56

So Jesus said again, “I tell you the truth, unless you eat the flesh of the Son of Man and drink his blood, you cannot have eternal life within you. But anyone who eats my flesh and drinks my blood has eternal life, and I will raise that person at the last day. For my flesh is true food, and my blood is true drink. Anyone who eats my flesh and drinks my blood remains in me, and I in him.