Ibn Sirin (may Allah have mercy on him) says that Sayyiduna Ibn Umar (may Allah be pleased with them both) used to recite ten surahs in a single rak'ah.
Asim (may Allah have mercy on him) says: I mentioned this to Abu al-Aliyah (may Allah have mercy on him), and he said: I recite twenty surahs in a single rak'ah, but someone who heard the Messenger of Allah (peace and blessings be upon him) told me that he said: "Every surah has its share of bowing and prostration."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4694