Part 15 · Chapter 214

And this is the secret of the reading of the Megillah, and also of its being spread out during the reading, for the reason of publicizing the miracle. And it is the matter of the illumination of the Atarah of the Malchut of Aba, which is revealed and emerges outward. Therefore it is called Megillah, an expression of revelation (giluy), and one must reveal and publicize it. Also, "Megalah" without a yud equals in gematria 78, the count of the three Names HVYH, 26, 26, 26, which are the matter of the three Mochin of HBD of the NHY of Aba, revealed there in that Malchut.