the Shlichim history 1:10-11

and as they were so steadfastly looking to the heaven, while he did go away up, look, beside them are standing two men in white clothing; which did also say: you (PL) men of Galilee, why stand you (PL) and look up to the heaven? the one this very Yehoshua, who is taken up become from you (PL) in heaven into, will on such manner come, as you (PL) did him see going up in heaven into.