Polytes eke his brother’s harte
With sworde that opened wyde.
Herodotus. Gel. li. 4. cap. 3.
And where as that Cambyses is,
His sister once that slewe:
And Polipontes king that made,
His brother treason rewe.
And cruell where Odores s,
Which mercy did deny
To Mithridate his brother deare,