R. Nathan says: Whence is it derived that the L–rd showed our father Abraham, Gehennom, the giving of the Torah and the splitting of the Red Sea? From (Genesis 15:17) "And it was, when the sun had set, and it was dark, and, behold, a smoking furnace"—Gehennom, viz. (Isaiah 31:9) "He has an oven in Jerusalem." And "the torch of fire" (Genesis, Ibid.)—the lightning, viz. (Exodus 20:15) "And all the people saw the sounds and the lightnings. (Genesis, Ibid. 19) "between these pieces"—the splitting of the Red Sea—viz. (Psalms 136:13) "Who split the Red Sea into pieces."