John 7:37-39 - The Promise Of The Spirit
37 On the last day, the great day of the feast, Jesus stood and cried, saying: If any one thirst, let him come to me and drink. 38 He that believes on me, as the scripture has said, from his inner self shall flow rivers of living water. 39 But this he spoke of the Spirit, which those who believe on him were about to receive; for the Holy Spirit had not yet been given, because Jesus had not yet been glorified.