Reference for Bava Batra 200:3

דרך הקבר אין לה שיעור: משום יקרא דשכבא:

THE HALTING PLACE HAD, SAID THE JUDGES OF SEPPHORIS, AN AREA OF FOUR <i>KAB</i> etc. Our Rabbis taught: If a person has sold his [family] grave, the path to [this] grave, his halting place<span class="x" onmousemove="('comment',' V. supra p. 416, n. 8, and n. 4 infra. ');">⁶</span> or his house of mourning, the members of [his] family may come and bury him perforce,<span class="x" onmousemove="('comment',' They may force the buyer to take back the purchase price and cancel the sale. ');">⁷</span> in order [to avert] a slight upon the family.<span class="x" onmousemove="('comment',' Keth. 84a. Bek. 52b. ');">⁸</span>

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