In the first book, Theophilus, I wrote about all that Jesus did and taught from the beginning
until the day when he was taken up to heaven, after giving instructions through the Holy Spirit to the apostles whom he had chosen.
After his suffering he presented himself alive to them by many convincing proofs, appearing to them during forty days and speaking about the kingdom of God.
While staying a with them, he ordered them not to leave Jerusalem, but to wait there for the promise of the Father. "This," he said, "is what you have heard from me;
for John baptized with water, but you will be baptized with b the Holy Spirit not many days from now."
So when they had come together, they asked him, "Lord, is this the time when you will restore the kingdom to Israel?"
He replied, "It is not for you to know the times or periods that the Father has set by his own authority.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (New Revised Standard Bible Version Online)