Acts 1:1-5 - The Preface
1 I WROTE my first account, O Theophilus, of all things which Jesus did and taught, 2 till the day that having given charge to the apostles whom he chose by the Holy Spirit he was taken up; 3 to whom also he presented himself living after his suffering, by many proofs, being seen by them during forty days, and speaking things relating to the kingdom of God.
4 And assembling them, he charged them not to depart from Jerusalem, but to wait for the promise of the Father, which [says he] you have heard from me; 5 that John baptized indeed with water, but you shall be baptized with the Holy Spirit after a few days.