The Samaritan woman therefore said to him, "How is it that you, being a Jew, ask for a drink from me, a Samaritan woman?" (For Jews have no dealings with Samaritans.)

 Jesus' answer to his disciples was that he had food of which they knew nothing. In their simplicity they wondered if someone had brought him food to eat. Then he told them: "My food is to do the will of him who sent me." 