Shaqiq (may Allah have mercy on him) narrates from Abdullah (may Allah be pleased with him); he mentioned a hadith with the same meaning as the hadith of Waki', except that he said: "The best prayer is the one with bowing and prostration. I know the similar surahs that the Messenger of Allah (peace and blessings be upon him) used to recite, two in each rak'ah: twenty surahs in ten rak'ahs."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4693