And when he had spoken these things, while they beheld, he was taken up; and a cloud received him out of their sight.
All Commentaries on Acts 1:9 Go To Acts 1
Justin Martyr
AD 165
And when He had thus shown them that there is truly a resurrection of the flesh, wishing to show them this also, that it is not impossible for flesh to ascend into heaven (as He had said that our dwelling-place is in heaven), "He was taken up into heaven while they beheld"