John 7:37-39 - The Promise Of The Spirit
37 On the last day, the great day, of the feast, Jesus stood and cried aloud, "If anyone is thirsty, let him come to me and drink. 38 Whoever continues to believe in me will have, as the Scripture says, rivers of living water continuously flowing from within him." 39 By this He referred to the Spirit that those believing in Him were going to receive -- for the Spirit had not yet come, because Jesus had not yet been glorified.