Acts 1:9-11

9And having said these things he was taken up, they beholding [him], and a cloud received him out of their sight.

10And as they were gazing into heaven, as he was going, behold, also two men stood by them in white clothing,

11who also said, Men of Galilee, why do ye stand looking into heaven? This Jesus who has been taken up from you into heaven, shall thus come in the manner in which ye have beheld him going into heaven.