Abdullah bin Abi Qatadah (may Allah have mercy on him) narrates from his father (may Allah be pleased with him) that he (peace and blessings be upon him) used to recite in the first two rak'ahs of Zuhr, reciting Surah al-Fatihah and a surah in every rak'ah. He (peace and blessings be upon him) would lengthen the first rak'ah and make the second somewhat shorter, and sometimes he would let us hear a verse.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2457