Acts 1:1-5 - The Preface
1 IN my former volume, Theophilus, I treated all that Jesus began by doing and teaching 2 down to the day when, after issuing his orders by the holy Spirit to the disciples whom he had chosen, he was taken up to heaven. 3 After his sufferings he had shown them that he was alive by a number of proofs, revealing himself to them for forty days and discussing the affairs of God's Realm.
4 Also, as he ate with them, he charged them not to leave Jerusalem but to wait for what the Father promised ??"for what you have heard me speak of," said he; 5 "for John baptized with water, but not many days after this you shall be baptized with the holy Spirit."