Musannaf Ibn Abi Shaybah 3601 — What is recited in the Fajr prayer

Abu Rafi' said that Sayyiduna Umar (may Allah be pleased with him) used to recite one hundred verses of Surah al-Baqarah in the Fajr prayer and follow them with a surah from the Mathani or from the beginning of the Mufassal. And if he recited one hundred verses of Surah Al Imran, he would likewise follow them with a surah from the Mathani or from the beginning of the Mufassal. The surahs from Surah al-Hujurat to the end of the Qur'an are called the "Mufassal". The "Mufassal" is of three kinds: the long (tiwal), the medium (awsat) and the short (qisar). The long Mufassal runs from Surah al-Hujurat to Surah al-Buruj, the medium Mufassal from Surah al-Tariq to Surah al-Bayyinah, and the short Mufassal from Surah al-Qadr to Surah al-Nas. In the above report, "the beginning of the Mufassal" means the surahs of the long Mufassal.