Reference for Bekhorot 66:1

ולוקמה כולה כר' אלעזר ברבי שמעון

And why not interpret [the above Baraitha] altogether in accordance with R'Eleazar son of R'Simeon?<span class="x" onmousemove="('comment',' As he holds that unfit sacrifices retain holiness even after having been slaughtered, and it is the same with a blemished firstling.');">¹</span>

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