Reference for Keritot 29:45

טעמא דר' אליעזר התם משום דהוא דעבד תרתין ואמטול להכי אמר

and therefore R'Eliezer said that he was liable for each act; in the instance, however, of a man cutting a plan of the size of a dried fig<span class="x" onmousemove="('comment',' The legal minimum involving the desecration of the Sabbath is the size of a dried fig.');">²⁸</span>

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