If you say, ‘What will we eat in the seventh year if we do not sow and gather our produce?’ I will command my blessing for you in the sixth year so that it may yield the produce for three years, and you may sow the eighth year and eat from that sixth year’s produce – old produce. Until you bring in the ninth year’s produce, you may eat old produce.
-Leviticus 25:20–22 (promise of a crop sufficient for three years is read as presupposing two consecutive fallow years (the forty-ninth and the fiftieth) which is possible only if the fiftieth is a distinct year rather than the first of the next cycle)