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The Symbols and Their Meaning in Taqrīb al-Tahdhīb by Ḥāfiẓ Ibn Ḥajar al-ʿAsqalānī
In his monumental work Taqrīb al-Tahdhīb, Ḥāfiẓ Ibn Ḥajar introduces a system of rumūz (symbols) to indicate which major ḥadīth scholars and collections have narrated the reports of specific narrators. This system is a crucial tool for scholars and students of ḥadīth to quickly identify the sources where a narrator's ḥadīths can be found, particularly within the six major ḥadīth collections (Kutub al-Sittah) and related works.
Explanation by Ḥāfiẓ Ibn Ḥajar
Ibn Ḥajar states:
وقد اكتفيت بالرقم على أول اسم كل راوٍ، إشارة إلى من أخرج حديثه من الأئمة.
"I have used numbers at the beginning of each narrator's name to indicate which of the imams have recorded their ḥadīths." (تقريب التهذيب – ص: 76)
Ibn Ḥajar further clarifies his methodology by listing the rumūz and their corresponding references as follows:
Books of al-Bukhārī:
Books of Muslim:
Books of Abū Dāwūd:
Books of al-Tirmidhī:
Books of al-Nasāʾī:
Books of Ibn Mājah:
1. Primary sources:
If a narrator's ḥadīth appears in any of the six major collections (Kutub al-Sittah), the corresponding ramz is used. Even if the same ḥadīth is found in other works, no additional symbols are added.
2. Comprehensive reference:
If the narrations of a narrator are present in all six collections, Ibn Ḥajar uses the symbol (ع).
3. Excluding the two shaykhs:
For narrators whose ḥadīths are present in the works of the four imams (Abū Dāwūd, al-Tirmidhī, al-Nasāʾī, and Ibn Mājah) but not in Ṣaḥīḥ al-Bukhārī or Ṣaḥīḥ Muslim, the symbol (4) is used.
4. Narrators outside these works:
If a narrator's ḥadīth is not found in the six collections or their associated works, Ibn Ḥajar assigns the term (تمييز), indicating that the narrator is included for distinction rather than for their contributions to these major collections.
5. Unmarked narrators:
If no specific ramz is assigned to a narrator, Ibn Ḥajar either mentions their status explicitly or includes them in an appendix with additional commentary.
A short reference to the principal ḥadīth-collection genres: ṣaḥīḥ, jāmiʿ, sunan, musnad, mustakhraj, muṣannaf, mustadrak, aṭrāf, juzʾ, muʿjam and tajrīd.
An introduction to the six universally accepted books of Sunni ḥadīth and the criteria each compiler used for inclusion.
A bibliographical survey of the major classical works in al-jarḥ wa al-taʿdīl, from the earliest rijāl compilations to Ibn Ḥajar al-ʿAsqalānī.
How Ibn Ḥajar's Taqrīb al-Tahdhīb groups narrators of the six canonical ḥadīth collections into twelve generational classes (ṭabaqāt).
