What s_adelheid said, plus "On the last and greatest day of the Feast, Jesus stood and said in a loud voice, "If anyone is thirsty, let him come to me and drink. Whoever believes in me, as the Scripture has said, streams of living water will flow from within him."

I preached on that once, only my mother (who was present) made a rude comment about going to the loo, so I don't think I'll do that again!