After his death, he presented himself alive to them in many different settings over a period of forty days. In face-to-face meetings, he talked to them about things concerning the kingdom of God.
As they met and ate meals together, he told them that they were on no account to leave Jerusalem but "must wait for what the Father promised: the promise you heard from me.
What you'll get is the Holy Spirit. And when the Holy Spirit comes on you, you will be able to be my witnesses in Jerusalem, all over Judea and Samaria, even to the ends of the world."
They said, "You Galileans!--why do you just stand here looking up at an empty sky? This very Jesus who was taken up from among you to heaven will come as certainly--and mysteriously--as he left."
They went to the upper room they had been using as a meeting place: Peter, John, James, Andrew, Philip, Thomas, Bartholomew, Matthew, James, son of Alphaeus, Simon the Zealot, Judas, son of James.
and said, "Friends, long ago the Holy Spirit spoke through David regarding Judas, who became the guide to those who arrested Jesus. That Scripture had to be fulfilled, and now has been.
It's exactly what we find written in the Psalms: Let his farm become haunted So no one can ever live there. "And also what was written later: Let someone else take over his post.