אַב מְלָאכָה

ביטוי (אנגלית)

Principal Labor (Forbidden Work on the Sabbath)

הגדרה (אנגלית)

A primary category of labor forbidden on the Sabbath, from which derivative labors (toladot) are derived—additional prohibited activities learned from the main one.

("A general rule was stated regarding the Sabbath: One who forgets the essence of the Sabbath and performs many labors on many Sabbaths is liable for only one sin-offering. One who knows the essence of the Sabbath but performs many labors on many Sabbaths is liable for each Sabbath. One who knows it is the Sabbath and performs many labors on many Sabbaths is liable for each and every principal labor." — Babylonian Talmud, Shabbat 7a)