Fish for Shabbat—Deliverance from Judgment
The students of the Ari HaKadosh, may the memory of the tzadik be a blessing, related that their teacher would often repeat the following phrase at the Shabbat table: “Who eats dag on dag, will be saved from dag”. By this idiom, the Arizal meant the following:
“Dag” (דג)—in Hebrew means— “fish”. The gematria of the word “dag” is 7 (the seventh day of the week); The abbreviation formed by the letters of the word “dag” means —“Din Gehinnom”—the judgment of the Heavenly Court, according to which the soul of a sinner is sent to Gehinnom); Thus, the meaning of the phrase “Who eats dag on dag will be saved from dag” was explained by the Arizal as follows: “Whoever eats “dag” (fish) on “dag” (on the seventh day—on Shabbat) will be saved from “dag” (the suffering of Gehinnom).”
Eating fish on Shabbat is a segula 18 тевета йорцайт раби цви элимелех из The prohibition against eating fish and meat together—the Jewish prohibitions of our grandmothers The Prohibition Against Eating Fish and Meat Together — Jewish Prohibitions of Our Grandmothers Parashat HaMan and fish Parashat HaMan and Fish(from the book by Yaakov Shechter, “A Voice in the Silence” (a story about Rabbi Meir of Konstantinov)