Sahih Bukhari | Volume 1 | Hadith Number 745

Narrated by 'Abdullah bin Abi Qatada
My father said, "The Prophet used to recite Al-Fatiha along with another Sura in the first two Rakat of the Zuhr and 'Asr prayers. A verse or so was audible at times and he used to prolong the first Rak'a."