Reference for Chullin 280:14

ביצים מוזרות מהו

R'Zera raised the question: What is the law if a dove was sitting on a tasil's<span class="x" onmousemove="('comment',' a clean bird, resembling a dove; cf. supra 62a.');">⁹</span>

Rashi on Deuteronomy

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