Reference for Yevamot 76:12

והא הכא יורשי האב ודאי וב"ח ספק וקאתי ספק ומוציא מידי ודאי

while the creditor pleads that the father died first and the son afterwards,<span class="x" onmousemove="('comment',' And the son had, therefore, inherited his father's estate which may consequently be seized in payment of the son's debts. ');">²²</span> Beth Shammai hold [that the amount in dispute is] to be divided,<span class="x" onmousemove="('comment',' Between the creditor and the heirs, their respective claims being regarded by Beth Shammai as of equal force. ');">²³</span>

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