Reference for Gittin 110:1

ומה טעם אמרו נודעה אינה מכפרת שלא יאמרו מזבח אוכל גזילות

Why then was it laid down that if [the fact is] known it is not expiatory?<span class="x" onmousemove="('comment',' This is not distinctly stated in the Mishnah, but is clearly implied. ');">¹</span>

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