It was narrated from Mu'awiyah bin Qurrah that his father said:
"The Messenger of Allah (ﷺ) sent me to a man who had married his father's wife after he died, to strike his neck (execute him) and confiscate his wealth." (ES)
English reference (ES): Vol. 3, Book 20, Hadith 2608 (ES)
Arabic reference (ES): Book 20, Hadith 2706 (ES)