Abu Wa'il reported:
A person came to 'Abdullah b. Mas'ud and said: I recited all the mufassal surahs in one rak'ah during the night. 'Abdullah said: You must have recited hastily like the recitation of poetry. 'Abdullah said: I remember well the manner in which the Messenger of Allah ( صلی اللہ علیہ وسلم ) used to combine them, and he then mentioned twenty of the mufassal surahs, and (their combinations in) two in every rak'ah.