What are the implications of the word "ba'Asosah"?
Shabbos, 93a: It implies "ba'Asosah", and not Miktzasah (part). This exempts, for example, two people who carry on Shabbos, from the Chiyuv. 1
See also Ba'al ha'Turim.
Why is part of every Asham, Chatas Hedyot and Chatas Nasi eaten by the Kohanim?