Reference for Zevachim 128:10

אמר רב זוטרא בר טוביה אמר רב כיצד מולקין חטאת העוף אוחז גפיו בשתי אצבעות ושתי רגלים בשתי אצבעות ומותח צוארה על רוחב גודלו ומולקה

Surely yimmazeh [shall be drained] is written, which implies of its own accord.<span class="x" onmousemove="('comment',' The blood must be so sprinkled that it will then naturally drain down on to the base.');">¹⁶</span> R'Zutra B'Tobiah said in Rab's name: How is the bird sin-offering pinched off? He grasps its two wings in two fingers, and its two legs in two fingers, stretches its neck over the width of his thumb and pinches it off.

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