Reference for Chullin 260:18

ושאינו מחזיק בתורת ה' אין לו מנת

I might say that the breast and the thigh are also a matter of right, the text therefore states And this.<span class="x" onmousemove="('comment',' Deut. XVIII, 3. Heb. In this verse it is translated as 'due', but generally it means 'judgment, right'. The use of this word in connection with these portions signifies that they are regarded as a legal right.');">⁵</span>

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