Sahih Bukhari

Narrated' `Abdullah:Once Allah's Messenger (ﷺ) offered five rak`at in the Zuhr prayer, and somebody asked him whether there was some increase in the prayer. Allah's Messenger (ﷺ) said, ""What is that?"" He said, ""You have offered five rak`at."" So Allah's Messenger (ﷺ) performed two prostrations of Sahu after Taslim