The Acts 1:10-11, 9

And while they were beholding him going up to heaven, behold two men stood by them in white garments. Who also said: Ye men of Galilee, why stand you looking up to heaven? This Jesus who is taken up from you into heaven, shall so come, as you have seen him going into heaven.

And when he had said these things, while they looked on, he was raised up: and a cloud received him out of their sight.