Sahih Bukhari
Sahih Bukhari Volume 002, Book 022, Hadith Number 316.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 22. Actions While Praying
Narated By 'Abdullah bin Buhaina : Allah's Apostle got up after the second Raka of the Zuhr prayer without sitting in between (the second and the third Rakat). When he finished the prayer he performed two prostrations (of Sahu) and then finished the prayer with Tasllm.