Enoch 108:4

And I saw there something like an invisible cloud; for by reason of its depth I could not look over, and I saw a flame of fire blazing brightly, and things like shining mountains circling and sweeping to and fro. And I asked one of the holy angels who was with me and said unto him: ' What is this shining thing? for it is not a heaven but only the flame of a blazing 6 fire, and the voice of weeping and crying and lamentation and strong pain.'