John 6:53-54, 58

Then Jesus said to them, “Most assuredly, I say to you, unless you eat the flesh of the Son of Man and drink His blood, you have no life in you. Whoever eats My flesh and drinks My blood has eternal life, and I will raise him up at the last day.

This is the bread which came down from heaven—not as your fathers ate the manna, and are dead. He who eats this bread will live forever.”