Reference for Zevachim 129:14

(ויקרא א, טו) ונמצה דמו כולו אל קיר המזבח ולא על קיר הכבש ולא על קיר ההיכל ואיזה זה זה קיר העליון

It follows by logic: 'and shall pinch off' is stated here, and 'and shall pinch off' is stated elsewhere:<span class="x" onmousemove="('comment',' Lev, V, 8: and shall pinch off its head close by its neck, but shall not divide it asunder.');">¹³</span> as there it is close by its neck, so here it is close by its neck.

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