In Acts 1, just before the resurrected Jesus was taken up into heaven, he told the disciples about the Father's promised gift of the Holy Spirit,

The book of Acts continues to record the miraculous outpouring of the Holy Spirit that began on the Feast of Pentecost. This Old Testament feast revealed "a shadow of the things that were to come; the reality, however, is found in Christ" (Colossians 2:17).