Reference for Menachot 160:5

אמר רבי זירא וכן לענין חטאות הפריש חטאתו ואבדה והפריש אחרת תחתיה ואבדה והפריש אחרת תחתיה ונמצאו הראשונות והרי שלשתן עומדות נתכפר בראשונה שניה תמות שלישית תרעה

if by the second, the other two do not require the bread-offering.<span class="x" onmousemove="('comment',' For both the first and the third are directly connected with the second, and are now the surplus of that which was actually offered.');">⁶</span> Abaye said, Even though he obtained atonement by any one of them the other two do not require the bread-offering. because each was replaced by the other.<span class="x" onmousemove="('comment',' So that even the third, which only indirectly replaced the first, is also exempt from the bread-offering.');">⁷</span>

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