11 “Jesus says unto her, Give me to drink. For His disciples had gone away into the city to buy meat. Then says the Samaritan woman unto Him, How is it that you, being a Jew, ask drink of me, who am a Samaritan woman? For the Jews have no dealings with the Samaritans.” You see that they were aliens: indeed, the Jews would not use their vessels. And as the woman brought with her a vessel with which to draw the water, it made her wonder that a Jew sought drink of her—a thing which the Jews were not accustomed to do. But He who was asking drink was thirsting for the faith of the woman herself.
Source: Tractates on the Gospel of John (New Advent)