And al-Ḥāfiẓ Abū al-Faḍl Muḥammad ibn Ṭāhir al-Maqdisī, better known as Ibn al-Qaysarānī, combined the two books into a single volume entitled al-Jamʿ bayna Rijāl al-Ṣaḥīḥayn (Combining the Transmitters of the Two Ṣaḥīḥs). All of these works are now available in print. Ibn al-Qaysarānī’s compilation is concise: when he treats entries that share one name—“Aḥmad,” for instance—he first lists those called Aḥmad who appear in both al-Bukhārī and Muslim, then those found only in al-Bukhārī, and finally those found only in Muslim. One of its chief merits is that, whenever a narrator has few ḥadiths, he pinpoints the locations of those reports in the Ṣaḥīḥayn, or in whichever of the two they occur, by citing the specific kitāb (chapter) where the narration is recorded.

Shaykh Yaḥyā ibn Abī Bakr al-ʿĀmirī al-Yamanī likewise authored a work devoted to the Companions who transmit in the two Ṣaḥīḥs, or in either of them, entitled al-Riyāḍ al-Mustaṭāba fī Jumlati man Rawā fī al-Ṣaḥīḥayn mina al-Ṣaḥāba; it is a book of tremendous benefit.

It is also appropriate to mention here that al-Ḥāfiẓ al-Dhahabī has a book