משנה אויף ויקרא 5:13

[The court] is not obligated [to bring an offering] for [an errant ruling relating to] the hearing of the voice [of adjuration]; for an oath made by an expression, or for impurity relating to the Temple and its holy things. And the ruler is similarly [exempt]; these are the words of Rabbi Yose Hagalili. Rabbi Akiva says; the ruler is liable in the case of all these except that of hearing of the voice [of adjuration], because the king may neither judge nor be judged, neither may he testify nor may others testify against him.

If a man’s wife had gone to a country beyond the sea and he was told, “Your wife is dead”, and he married her sister, and afterwards his wife came back, [the latter] is permitted to return to him. He is permitted to marry the relatives of the second woman, and the second woman is permitted to marry his relatives. If the first wife died he is permitted to marry the second. If he was told that his wife was dead, and he married her sister, and then he was told that she was then alive but had since died, any child born before [his first wife’s death] is a mamzer, but anyone born after [her death] is not a mamzer. Rabbi Yose says: whoever disqualifies for others disqualifies for himself and whoever does not disqualify for others does not disqualify for himself.