Reference for Bekhorot 4:16

אפילו תימא רבי יהודה שבורה לאו היינו אורחיה עובר היינו אורחיה:

Some there are who referred [R'Judah's ruling on an embryo] to our Mishnah:<span class="x" onmousemove="('comment',' And do not, in the first place, propound a query which they subsequently attempt to solve from the MISHNAH:');">¹³</span>

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