Reference for Zevachim 95:21

אשכחן שחיטה קבלה מנא לן דכתיב (ויקרא ד, כה) ולקח הכהן מדם החטאת

[it is entailed only by] that whose deliberate infringement entails kareth, while its unwitting infringement involves a sin-offering.<span class="x" onmousemove="('comment',' I.e., a guilt-offering of suspense is brought only when one is in doubt whether he has committed an offence, which, if certainly committed, entails kareth or a sin-offering. But the secular misuse of sacred property does not involve a sin-offering, consequently one is not liable to a guilt-offering for doubtful trespass.');">¹⁸</span>

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