Reference for Bava Metzia 209:15

ולא פליגי הא באתרא דמעיילי כורא באוללא הא באתרא דמעיילי תלתא כורין באוללא

<b><i>MISHNAH</i></b>. IF A MAN LEASES A FIELD TO HIS NEIGHBOUR, AND IT DOES NOT YIELD [A SATISFACTORY CROP]: IF THERE IS ENOUGH TO MAKE A STACK, HE [THE TENANT] IS BOUND TO GO ON WORKING THEREIN.<span class="x" onmousemove="('comment',' Though he wishes to cease work, the yield being in, sufficient reward for his labour. ');">¹⁴</span>

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