Narrated Zaid bin Khalid Al-Jihani: 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.
— Sahih Bukhari, Volume 8, Book 82: Punishment of Disbelievers at War with Allah and His Apostle, Hadith #818
