Mustakhraj (books 'extracted' on a Sahih)

A mustakhraj ("extraction") is a book in which a hadith master later than the author of a hadith collection takes the hadiths of that collection and transmits them through his own chains. ² In the introduction to his commentary on Muslim, al-Nawawi notes that numbers of hadith masters wrote such books on Sahih Muslim; they lived after Muslim and reached high chains, some of them having met some of Muslim's own teachers. ²

Al-Nawawi quotes Ibn al-Salah that these extracted books share in Sahih Muslim's character as sound, though not in all its distinctions. ² They bring three benefits: higher chains, greater strength for a hadith through more routes, and additional sound and useful wording. ² Their authors did not undertake to match the original's wording, since they transmit by other chains, so differences occur. ²

Al-Nawawi lists among them: ¹

• The book of Abu Ja'far Ahmad b. Hamdan al-Naysaburi, the ascetic.
• Al-Musnad al-Sahih of Abu Bakr Muhammad b. Muhammad b. Raja' al-Naysaburi, an early master who shares most of Muslim's teachers.
• Mukhtasar al-Musnad al-Sahih al-Mu'allaf 'ala Kitab Muslim of Abu 'Awana Ya'qub b. Ishaq al-Isfara'ini, who narrates in it from Yunus b. 'Abd al-A'la and other teachers of Muslim.
• The book of Abu Hamid al-Shariki of Herat, a Shafi'i jurist, who narrates from Abu Ya'la al-Mawsili.
• Al-Musnad al-Sahih of Abu Bakr Muhammad b. 'Abd Allah al-Jawzaqi al-Naysaburi.
• Al-Musnad al-Mustakhraj 'ala Kitab Muslim of Abu Nu'aym Ahmad b. 'Abd Allah al-Isfahani.
• Al-Mukharraj 'ala Sahih Muslim of Abu al-Walid Hassan b. Muhammad al-Qurashi, a Shafi'i jurist.