Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: A man came and said: I recited the whole of the Mufassal in one rak'ah. He said: Is that not rattling through it hastily like poetry? But the Messenger of Allah (peace and blessings be upon him) used to recite surahs of similar length and theme, two surahs at a time, twenty surahs in all.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9823