but whoever drinks of the water that I will give him will never thirst again; but the water that I will give him will become in him a well of water springing up to eternal life."

 4:31-34 Meanwhile his disciples asked him: "Rabbi! Eat something! have food," he said to them, "of which you do not know." "Surely," his disciples kept saying to each other, "someone can't have given him something to eat?" "My food," said Jesus to them, "is to do the will of him who sent me and to complete his work." 