אָבִי אֲבוֹת הַטֻּמְאָה

ביטוי (אנגלית)

Principal cause of defilement / Chief pollution

הגדרה (אנגלית)

Figuratively: the source of evil or corruption; the most despicable; the root of the problem (originally: a dead body, considered the primary source of ritual impurity).

("‘It shall be unclean until evening’ — from here we learn that a corpse is the father of fathers of impurity." — Rashi, Numbers 19:22; "Idle chatter is the father of fathers of impurity, for in a multitude of words sin is not lacking." — Pele Yoetz, Letter D; "May the spirit of their father of fathers of impurity perish, from old Terah to Uncle Ishmael included." — Sholem Aleichem, A Story Without End)