Reference for Niddah 52:12

אמר ר' יהודה לא אמרו טפח אלא מן התנור ולכותל

is also one in dispute, for in the final clause it was stated: R. Judah said, They spoke of the length of a handbreadth only between the oven and the wall.<span class="x" onmousemove="('comment',' Near which the oven is placed. Where a stone is of greater length it prevents the oven from being brought up to the wall and is removed in consequence. Only in such a case is the size restricted to a handbreadth. Where, however, the stone projects on another side, since it would not be removed, it is regarded as a handle. ');">¹²</span>

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