Reference for Chullin 266:21

באותן הנמכרים בתוך הבית

Furthermore, it has been expressly taught: [If he said.] 'The head shall be mine and the rest yours', or even 'One hundredth part of the head [shall be mine]', he is exempt from giving the cheeks but he is liable to give the others! - This is surely a refutation of the view of Hiyya B'Rab.

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