Reference for Bava Batra 61:1

אבל שית אין לך מחאה גדולה מזו:

but if only six years, then no protest could be more effective than this.<span class="x" onmousemove="('comment',' Namely, the action of the original owner in selling the land after the occupier had been on it only two years, so that in reality he never acquired hazakah. ');">¹</span>

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