surahs that are comparable which the Messenger of Allah would recite together.'" He said: "So we told Alqamah to ask him (what they were). He said: "Twenty
surahs from the Mufassal from which the Prophet would combine, reciting every two Surah in a Rak'ah.'"
In-book : Book 6, Hadith 59
English translation : Vol. 2, Book 1, Hadith 602