From Sahih Bukhari (Hadith 778):
Narrated `Abdullah bin Abi Qatada:My father said, "The Prophet (ﷺ) used to recite Al-Fatiha along with another Sura in the first two rak`at of the Zuhr and `Asr prayers. A verse or so was audible at times and he used to prolong the first rak`a
Reference: Bukhari 778