Reference for Chullin 278:63

עוף משמע לן בין טהור בין טמא

Come and hear: It is written: And thou, son of man, [thus saith the Lord God]: Speak unto the zippor of every sort.<span class="x" onmousemove="('comment',' Lit., 'of every winged (species) '. Ezek. XXXIX, 17.');">³⁴</span>

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Rashi on Deuteronomy