Reference for Niddah 102:2

כל שחייב בפאה חייב במעשר

to tithe, for we have learnt, WHATSOEVER IS SUBJECT TO THE OBLIGATION OF <i>PE'AH</i> IS ALSO SUBJECT TO THAT OF TITHES; and since it is liable to tithe it is also susceptible to food uncleanness. It is accordingly evident that anything that is used as a flavouring is susceptible to food uncleanness, since dill is used as a flavouring. But is not this incongruous with the following: 'Castus,<span class="x" onmousemove="('comment',' [G], a fragrant root, ');">²</span>

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