It is reported from al-Sha'bi (may Allah have mercy on him): Behind the imam, in the first two rak'ahs of Zuhr and Asr, recite Surah al-Fatihah and some surah, and in the last two rak'ahs recite Surah al-Fatihah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2956