John 4:9-10

4:9 So the Samaritan woman said to him, “How can you – a Jew – ask me, a Samaritan woman, for water to drink?” (For Jews use nothing in common with Samaritans.)

4:10 Jesus answered her, “If you had known the gift of God and who it is who said to you, ‘Give me some water to drink,’ you would have asked him, and he would have given you living water.”

John 6:53

6:53 Jesus said to them, “I tell you the solemn truth, unless you eat the flesh of the Son of Man and drink his blood, you have no life in yourselves.