John 6
52 Ref Then the Jews had an angry discussion among themselves, saying, How is it possible for this man to give us his flesh for food?
53 Ref Then Jesus said to them, Truly I say to you, If you do not take the flesh of the Son of man for food, and if you do not take his blood for drink, you have no life in you.
54 Ref He who takes my flesh for food and my blood for drink has eternal life: and I will take him up from the dead at the last day.