Sahih Muslim

Tatabbu' is the short name for Kitab al-Ilzamat wa al-Tatabbu', a 10th-century work by the hadith scholar al-Daraqutni (d. 385 AH / 995 CE). The Arabic word tatabbu' means "the pursuit" or "the follow-up" -- so the book is literally al-Daraqutni's follow-up review of the two Sahih collections. In it, he goes through specific narrations in Sahih al-Bukhari and Sahih Muslim and flags places where a single chain (isnad) or a single wording (matn) appears, to him, to have a technical flaw: a transmitter who never met his teacher, an extra word inserted by one student, a clause that should be quoted as a Companion's statement rather than as the Prophet's words, and so on.

The crucial point -- emphasized by both the classical commentators and modern scholarship (see Brown 2004, Journal of Islamic Studies 15:1) -- is that al-Daraqutni never claimed the Prophet did not say these things. His critiques target individual narration routes, not the underlying traditions. In almost every case, the same tradition is preserved through other sound chains in al-Bukhari, Muslim, or elsewhere. Ibn Hajar al-Asqalani and al-Nawawi systematically answered each of his criticisms.

Al-Albani (d. 1420 AH / 1999 CE) is the second voice in the table. He was a 20th-century scholar who, in works such as al-Silsila al-Da'ifa and Irwa' al-Ghalil, weakened a small number of specific hadith -- roughly ten in Bukhari and seven in Muslim -- usually targeting a single word or phrase rather than an entire tradition. He himself acknowledged he had not systematically reviewed the Sahihayn.

In the table, a label like Tatabbu' 69 means "entry number 69 in al-Daraqutni's catalog," while Bukhari 1050 means "hadith number 1050 in Sahih al-Bukhari as numbered on this site." The two referencing systems sit side by side because that is how the academic literature presents the dataset.