And both of them should be exiled, as Allah the Exalted has said in Surah An-Nur: "The woman and the man guilty of fornication, flog each of them with a hundred stripes, and let not pity for them detain you in the matter of Allah, if you believe in Allah and the Last Day. And let a party of the believers witness their punishment. Know that the adulterer marries none but an adulteress or a polytheist woman, and the adulteress marries none but an adulterer or a polytheist man, and this is forbidden to the believers." And Sufyan bin ‘Uyaynah said in the explanation of «ولا تأخذكم بهما رأفة في دين الله» : Do not show mercy to them in carrying out the prescribed punishment.

Narrated Zaid bin Khalid Al-Juhani: I heard the Prophet ordering that an unmarried person guilty of illegal sexual intercourse be flogged one-hundred stripes and be exiled for one year.

Umar bin Al-Khattab also exiled such a person, and this tradition is still valid.

Narrated Abu Huraira: Allah's Apostle judged that the unmarried person who was guilty of illegal sexual intercourse be exiled for one year and receive the legal punishment (i.e., be flogged with one-hundred stripes) .