'Ubadah bin As-Samit (RAA) narrated that the Messenger of Allah (ﷺ) said:
"Receive from me (this revelation), receive from me (this revelation). Allah has ordained a way for those women (unmarried females who committed adultery). When an unmarried man, commits adultery with an unmarried woman, they should receive one hundred lashes and be exiled for a year. If they (fornicate while they) were married, they shall receive hundred lashes and be stoned to death. Reported by Muslim.
English reference: Book 10, Hadith 1245
Arabic reference: Book 10, Hadith 1206