Reference for Bava Metzia 208:12

אמר ליה רב אשי לרב כהנא אמרי אינשי כחשא ארעא ולא לכחוש מרה

A certain man once leased a field from his neighbour and stated: 'If I do not cultivate it, I will give you a thousand <i>zuz</i>.'<span class="x" onmousemove="('comment',' A percentage lease is referred to. ');">⁹</span>

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