Reference for Chullin 74:13

זו מסוכנת

[To teach you that] in this case [sc. trefah] there is no distinction between the fat and the flesh,<span class="x" onmousemove="('comment',' For both are forbidden to be eaten, and there are two prohibitions since it has been taught that the prohibition of trefah can he superimposed upon the prohibition of fat.');">⁷</span>

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