Why do hadith numbers differ between different print and digital editions?

Hadith collections like Sahih al-Bukhari were originally organized by chapter and topic, not by a single running number; numbering was added later by editors to make referencing and cross-checking easier. Different editors, however, made different decisions about what counted as a separate hadith. Some counted a hadith with two different chains, or the same narration repeated in two chapters to illustrate two rulings, as one entry; others numbered each repetition or chain separately. Some early print editions also split long hadith into multiple numbered segments, while later editions merged them back into one. As a result, a hadith that is 'Sahih al-Bukhari 1' in one popular edition or website might carry a different number in another, even though the underlying Arabic text and chapter are identical. The most common modern reference standard is the numbering used in Muhammad Fuad Abd al-Baqi's edition of Bukhari and similar standardized editions of Muslim, which most contemporary books and websites, including large hadith databases, now follow, though readers researching older scholarship or print editions should still expect occasional mismatches and should compare the actual Arabic text or chapter title rather than relying on the number alone.

Ask your own question → All questions