Sahih Bukhari Volume 8, Book 82, Hadith Number 824.

Narrated By Ash-Shaibani : I asked ‘Abdullah bin Abi ‘Aufa about the Rajam (stoning somebody to death for committing illegal sexual intercourse). He replied, “The Prophet carried out the penalty of Rajam,” I asked, “Was that before or after the revelation of Surat-an-Nur?” He replied, “I do not know.”