תלמוד בבלי, חגיגה יד ע"ב
b. Hagigah 14b: The Pardes Account and the "Water, Water" Warning
Talmud Bavli, Chagigah 14b
The Babylonian Talmud, Hagigah 14b -- the baraita of the four who entered the pardes (Ben Azzai, Ben Zoma, Aher, Rabbi Akiva) and Rabbi Akiva's warning about the stones of pure marble. Vilna Romm edition.
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