John 7:39

Jesus said this about the Spirit. This makes Acts chapter two the best explanation of this section of verses. The fountain of living water which each Christian has, is the Holy Spirit (Ephesians 2:22; 1 Corinthians 6:19-20). [The one indispensable condition of receiving the Holy Spirit is perfect obedience to God's Law. Christ has fulfilled that condition for us (Romans 8:4). The sacrifice of Christ which makes us God's friends (the atonement) fulfilled every condition for God to pour out his Spirit upon all men. Therefore, Christ has qualified everyone for the Holy Spirit as a gift. But we must reach out through faith to seize his sacrifice and make ourselves part of it. See John 3:3-8 and notes.] The Spirit had not yet been given. First, Jesus had to die, be raised from death, and go back to the Father. Then, as he sits at the right side of the Father, he sent the Spirit to his disciples on the day of Pentecost. This was the official beginning of the preaching of the Good News.