Reference for Sanhedrin 155:12

הא תו למה לי היינו הך הרובע את הטריפה איצטריכא ליה מהו דתימא ליהוי כמאן דמשמש מת וליפטר קמ"ל דמשום הנאה הוא והא אית ליה הנאה

the other to a person dying naturally. Now, he who likens him to a <i>terefah</i>, why does he not liken him to a person dying naturally? — Because no injury has been done to the latter; but an injury has been done to this one. Whilst he who likens him to a person dying naturally, why does he not liken him to a <i>terefah</i>? — A <i>terefah</i> has his vital organs affected,<span class="x" onmousemove="('comment',' Lit., 'cut'. ');">¹²</span>

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