Reference for Niddah 95:3

אמר קרא

that one may sometimes sell three crops in two years.<span class="x" onmousemove="('comment',' And this is only possible in two complete years, or a full period of twenty-four months, where the sale took place before the produce of the first calendar year had been harvested. In two calendar years there can be no more than two crops. ');">³</span>

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