Acts 1:2, 8

until the day he was carried up into heaven. Before he went, he talked to the apostles he had chosen. With the help of the Holy Spirit, he told them what they should do.

But the Holy Spirit will come on you and give you power. You will be my witnesses. You will tell people everywhere about me—in Jerusalem, in the rest of Judea, in Samaria, and in every part of the world.”