Histories

These then replied to Cambyses with an answer which was both just and prudent, namely, that they could find no law enjoining a brother to marry his sister; but that they had found a law permitting the King of Iran [53,32] (nation), AsiaPersia to do whatever he liked.

Thus, although they feared Cambyses they did not break the law, and, to save themselves from death for keeping it, they found another law abetting one who wished to marry sisters.

So Cambyses married the object of his desire; yet not long afterwards he took another sister as well. It was the younger of these who had come with him to Egypt [30,27] (nation), Africa Egypt, and whom he now killed.