Reference for Arakhin 18:21

א"ל רב אדא בר אהבה לרבא

and days of thirty years?<span class="x" onmousemove="('comment',' And even when that is accounted for, there remain minutes, which added to one another amount in every thirty years to one complete day. The exact duration is: twenty-nine days, twelve 793/1080 hours, which time fragments combined add one day in every three, and one additional one every thirty years.');">¹³</span>

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