Acts 1:3-7

3To whom also he shewed himself alive after his passion by many infallible proofs, being seen of them forty days, and speaking of the things pertaining to the kingdom of God:

4And, being assembled together with them, commanded them that they should not depart from Jerusalem, but wait for the promise of the Father, which, saith he, ye have heard of me.

5For John truly baptized with water; but ye shall be baptized with the Holy Ghost not many days hence.

6When they therefore were come together, they asked of him, saying, Lord, wilt thou at this time restore again the kingdom to Israel?

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