Reference for Zevachim 212:12

משביעית מה לשביעית שכן תופסת דמיה

[Nor] from clean sherazim,<span class="x" onmousemove="('comment',' Those which do not defile, e.g., a frog or an ant, but which are forbidden as food by a negative interdict,');">¹³</span> [because,] As for clean sherazim, the reason is because [the standard of] their interdict is very small.<span class="x" onmousemove="('comment',' He who eats as much as a lentil is culpable; whereas no penalty is incurred for eating less than an olive size of heleb.');">¹⁴</span>

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