John 7:37-39 - The Promise Of The Spirit
37 And on the last great day of the feast, Jesus stood and continued to cry out, saying, If any one thirst, let him come and drink. 38 The one believing on me, as the Scripture said, out of his heart shall flow rivers of living water. 39 And He spoke this concerning the Spirit, whom those believing on Him were about to receive: for the Spirit was not yet; because Jesus was not yet glorified.