Book of Enoch
Chapter LXXXVII
And again I saw how they began to gore each other and to devour each other, and the earth began to cry aloud.
And I raised mine eyes again to heaven, and I saw in the vision, and behold there came forth from heaven beings who were like white men: and four went forth from that place and three with them.
And those three that had last come forth grasped me by my hand and took me up, away from the generations of the earth, and raised me up to a lofty place, and showed me a tower raised high above the earth, and all the hills were lower.