Reference for Kiddushin 77:11

רב חנן ורב ענן הוו שקלי ואזלי באורחא חזיוהו לההוא גברא דקא זרע זרעים בהדי הדדי א"ל ניתי מר נשמתיה א"ל לא חווריתו

just as [the prohibition of] 'thy cattle' [means] by copulation, so is [that of] 'thy field' by grafting;<span class="x" onmousemove="('comment',' I.e., in both cases the actual fusion of diverse species is forbidden.');">²²</span> and just as [the law in regard to] 'thy cattle' is in force b within and without the Land, so is [that concerning] 'thy field' in force alike within and without the Land. But still, 'thy field' is written!<span class="x" onmousemove="('comment',' Implying specifically thine, viz., Palestine.');">²³</span>

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