It is narrated from Mu'awiyah bin Qurrah (may Allah have mercy on him) that the Prophet (peace and blessings be upon him) sent his father, who was Mu'awiyah's grandfather, to a man who had married his father's wife. He struck off his neck and took a fifth of his wealth.
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 16098