"... The first thing which Enoch says he saw in heaven is a wall which is built of white marble and surrounded by tongues of fire (14:9). As it turned out, the wall surrounded a house. The house, no doubt, is identical with the heavenly divine palace, yet the manner in which it is described requires our comment. The house, its walls, its floor and its groundwork, were built of crystal. (The existence of hailstones in heaven could be inferred from Joshua 10, 11 and Job 38, 22; see also 1 Enoch 69:23, to say nothing of the fact that hail comes from the sky! See further Ezekiel 38:22; Revelation 16:21. Compare also Mechilta d’Rabbi Ismael, ed. Horovitz-Rabin, p. 111. Job 38:22 likewise mentions the heavenly origin of snow ...) Now, this description of the marble-like appearance of the walls most probably derives from Ezekiel 1:22 ..."