The Acts 1:6-11

They therefore, when they were come together, asked him, saying, Lord, dost thou at this time restore the kingdom to Israel? And he said unto them, It is not for you to know times or seasons, which the Father hath set within his own authority. But ye shall receive power, when the Holy Ghost 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. And when he had said these things, as they were looking, he was taken up; and a cloud received him out of their sight. And while they were looking stedfastly into heaven as he went, behold, two men stood by them in white apparel; which also said, Ye men of Galilee, why stand ye looking into heaven? this Jesus, which was received up from you into heaven, shall so come in like manner as ye beheld him going into heaven.