Reference for Bava Batra 142:1

אם איתא דלא שייר לימא ליה עקור אילנך שקול וזיל

if the vendor did not [tacitly] reserve some soil for himself, the purchaser could say to him [when the trees wither], pluck up your tree and be off with it.<span class="x" onmousemove="('comment',' Immediately (v. Tosaf.), and we assume that the vendor wished to keep a tree for himself in that place in perpetuity. ');">¹</span>

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