Miṣbāḥ al-Zujājah on the Additions of Ibn Mājah, the traditions of which number, in some editions, 1,552 ḥadiths.

The Six Books have attracted sustained scholarly care, both with regard to their aṭrāf (incipit indexes) and to the biographical study of their transmitters. The finest work devoted to their aṭrāf is Abū al-Ḥajjāj al-Mizzī’s Tuhfat al-Ashrāf bi-Maʿrifat al-Aṭrāf. He organized it by the names of the Companions—may Allah be pleased with them—listing beneath each Companion, in order, the Successors who narrated from him, and then citing the chains of transmission that link the authors of the Six Books to those Successors. In terms of isnād documentation, this monumental work virtually serves as alternate copies of the Six Books themselves.

As for the transmitters—indeed, for the narrators found in all the authors’ other compositions—the finest compilation is likewise by al-Mizzī: Tahdhīb al-Kamāl fī Asmāʾ al-Rijāl. It encompasses the names of the men found in the Six Books, together with the transmitters appearing in other works by their authors