Reference for Bava Batra 316:5
וטעמא מאי אמר אביי הואיל והוחזקה נחלה באותו שבט:
<b><i>GEMARA</i></b>. In whose established right of ownership?<span class="x" onmousemove="('comment',' Does the estate remain according to R. Akiba? ');"><sup>12</sup></span> — R. Elai said: In the established right of the ownership of the heirs of the mother. R. Zera said: In the established right of the ownership of the heirs of the son. When R. Zera went up [to Palestine] he adopted<span class="x" onmousemove="('comment',' Lit., 'stood'. ');"><sup>13</sup></span> the principle of R. Elai.<span class="x" onmousemove="('comment',' 'Rabbah adopted the principle of R. Zera', which follows in current editions is to be deleted. (V. BaH, R. Gersh. and R. Han, a.l.) — [It is, however, well to remember that R. Elai was a Palestinian and that R. Zera must have become aware of R. Elai's view only after he came to Palestine when he was led to abandon his own opinion, whereas Rabbah, who still remained behind in Babylon, retained the view of his colleague, R. Zera. Considered in this light, the reading in our current editions is quite in order.] ');"><sup>14</sup></span>