Reference for Chullin 282:62

אי דשלחה גזל מעליא הוא

And if for the purpose of the Festival,<span class="x" onmousemove="('comment',' Whatever is intended to be used on the Festival must be 'set in readiness' before the Festival, otherwise it would be regarded as mukzeh, i.e., laid aside and not to be used on the Festival. The knocking on the nest would therefore be regarded as setting them in readiness for the Festival.');">⁴¹</span>

Rashi on Deuteronomy

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