Reference for Keritot 7:27

ורבנן סברי

And if you were to ask, why should sheep be an exception, [the retort would be] because it was singled out in that its fat-tail is offered upon the altar, even as R'Hanania taught:<span class="x" onmousemove="('comment',' Bek. 5b. There the author of this dictum is given as R. Jose son of R. Hanina.');">¹¹</span>

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