Reference for Bava Batra 237:3

ואיבעית אימא הא והא לבאי הארץ ולא קשיא הא דהוה בן עשרים הא דלא הוה בן עשרים:

Was it not taught [elsewhere], 'by virtue of their own rights'? — [This is] no difficulty. That<span class="x" onmousemove="('comment',' The Baraitha stating, 'by virtue of their grandparents'. ');">⁵</span> is in agreement with him who said [that the division was] in accordance with [the number of] those who came out of Egypt; this<span class="x" onmousemove="('comment',' The other Baraitha stating 'by virtue of their own rights.' ');">⁶</span>

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