Reference for Zevachim 6:6

אלמא אתא קרא אפקיה מקל וחומר הכא נמי ליתי תוכו לפקיה מק"ו

If so, here too we can argue a fortiori: if sacred animals profane sacred animals, how much more does hullin!<span class="x" onmousemove="('comment',' When one kills a sin-offering as a burnt-offering, he is still killing it as something sacred, and yet you say it is unfit. How much more should it be unfit when he kills it as hullin, which is not sacred at all!');">⁶</span>

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