Acts 1:8-10

8But you will receive power when the Holy Spirit comes on you; and you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth.”

9After he said this, he was taken up before their very eyes, and a cloud hid him from their sight. 10They were looking intently up into the sky as he was going, when suddenly two men dressed in white stood beside them.