Reference for Bekhorot 119:24

וכי יש תמורה עושה תמורה

THESE ARE THE WORDS OF R'MEIR'SAID R'JUDAH: CAN THAT ONE SUBSTITUTE EFFECT ANOTHER SUBSTITUTE?<span class="x" onmousemove="('comment',' Because he maintains that the holiness of the eleventh animal is due to the fact that it is a substitute. For when he called the eleventh the tenth, it is as if he had said: 'Let this be holy instead of the tenth' and that which is already a substitute etc.');">²⁰</span>

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