Reference for Chullin 279:30

אי לשחיטה הא בעיא שילוח

But for which one?<span class="x" onmousemove="('comment',' For which of the two birds of the leper's offering could such a bird be used? Cf. Lev. XIV, 4ff, where two birds are prescribed for the leper's offering, one was to be slaughtered whilst the other was to be set free.');">²¹</span>

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