Reference for Bava Batra 213:5

רב אסי מספקא ליה אי יורשין הוו אי לקוחות הוו הלכך נוטל רביע בקרקע ורביע במעות

takes a quarter<span class="x" onmousemove="('comment',' Of his brother's share, i.e., an eighth of the original estate. ');">⁹</span> either in land or in money. Rab said that the division was to be cancelled, because he holds the opinion that brothers, even after having divided [their father's estate between them, remain] co-heirs.<span class="x" onmousemove="('comment',' Hence they remain collectively responsible for the payment of their father's debts. ');">¹⁰</span>

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