וְאֵיבָ֣ה ׀ אָשִׁ֗ית בֵּֽינְךָ֙ וּבֵ֣ין הָֽאִשָּׁ֔ה וּבֵ֥ין זַרְעֲךָ֖ וּבֵ֣ין זַרְעָ֑הּ ה֚וּא יְשׁוּפְךָ֣ רֹ֔אשׁ וְאַתָּ֖ה תְּשׁוּפֶ֥נּוּ עָקֵֽב׃ (ס)
我要使你和女人彼此為仇，你的後裔和她的後裔也彼此為仇；他們要擊碎你的頭，你要咬傷他們的腳跟。」
Sha'arei Orah
This is why whosoever does not bow when reciting the blessing of “submission-Modim-מודים,” after seventy years his spine will become a snake.81Talmud Bavli, Bava Kamma 16a The matter of seventy years is that it refers to the seventy ministering angels who stand in a circle [around the Sefirot] and the snake-Nachash-נחש is positioned to their exterior, standing in ambush around the qualities of victory-Netzach and majesty-Hod.82That is, the qualities of victory-Netzach and majesty-Hod are the two legs and feet, and it states about the snake-Nachash-נחש (Genesis 3:15), “You shall strike at their heel.”