Hadith.5043 - In the narration of Al-Hasan ibn Mahbub from Abu Ayyub, who heard Ibn Bukayr narrating from one of the Imams (peace be upon them), it is reported:
"Whoever commits fornication with a close relative (one prohibited in marriage) until intercourse occurs, he is to be struck with the sword in a blow that takes from him whatever it takes.
And if she consented to him, she is to be struck with the sword in a blow that takes from her whatever it takes."
It was asked
"And who carries out the punishment upon them when they have no accuser?"
Imam (as) replied: "That is up to the Imam when the case is presented to him."