Sahih al-Bukhari Hadith 518 – Volume 6, Book 61

English

Volume 6, Book 61, Number 518:
Narrated Shaqiq:
Abdullah said, "I learnt An-Naza'ir which the Prophet used to recite in pairs in each Rak'a." Then
Abdullah got up and Alqama accompanied him to his house, and when Alqama came out, we asked
him (about those Suras). He said, "They are twenty Suras that start from the beginning of Al-Mufas –
sal, according to the arrangement done be Ibn Mas'ud, and end with the Suras starting with Ha Mim,
e.g. Ha Mim (the Smoke). and "About what they question one another?" (78.1)