John 7:37-39

37In the last, the great day of the feast, Jesus stood and cried saying, If any one thirst, let him come to me and drink.

38He that believes on me, as the scripture has said, out of his belly shall flow rivers of living water.

39But this he said concerning the Spirit, which they that believed on him were about to receive; for [the] Spirit was not yet, because Jesus had not yet been glorified.