Reference for Shabbat 145:6

<big><strong>מתני׳</strong></big> אבות מלאכות ארבעים חסר אחת הזורע והחורש והקוצר והמעמר והדש והזורה הבורר הטוחן והמרקד והלש והאופה

We learnt: The primary labours are forty less one. Now we questioned this, Why state the number? And R. Johanan answered: [To teach] that if one performs all of them in one state of unawareness, he is liable [to a sacrifice] on account of each separately. Now, as for Abaye who ruled that in such a case one is liable, this is well: for this is conceivable where one knows the interdict of the Sabbath and the interdicts of labours, but errs in respect of the standards.<span class="x" onmousemove="('comment',' In each case he intended performing less than the standard for which liability is incurred, but actually performed the full standard. ');">⁸</span> But according to Raba who maintained that one is not culpable [for this], how is this conceivable? [Presumably] [only] where he was conscious of the Sabbath but unaware of [the forbidden character of his] labors. Now that is well if he agrees with R. Johanan who ruled, Since he was ignorant of <i>kareth</i>, even if he was conscious of the negative injunction, [he is liable]:<span class="x" onmousemove="('comment',' V. p. 329, n. 2. ');">⁹</span>

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