Acts 1:6

3 To whom he also showed himself alive after his passion by many proofs, appearing unto them by the space of forty days, and speaking the things concerning the kingdom of God:

4 and, being assembled together with them, he charged them not to depart from Jerusalem, but to wait for the promise of the Father, which, [said he], ye heard from me:

5 For John indeed baptized with water; but ye shall be baptized in the Holy Spirit not many days hence.

6 They therefore, when they were come together, asked him, saying, Lord, dost thou at this time restore the kingdom to Israel?

7 And he said unto them, It is not for you to know times or seasons, which the Father hath set within His own authority.

8 But ye shall receive power, when the Holy Spirit is come upon you: and ye shall be my witnesses both in Jerusalem, and in all Judaea and Samaria, and unto the uttermost part of the earth.

9 And when he had said these things, as they were looking, he was taken up; and a cloud received him out of their sight.