Title: al-Arbaʻūn al-Qudsīyah min al-Ṣaḥīḥayn maʻa sharḥihā
Subjects: Hadith, Criticism, interpretation
People: Muḥammad ibn Ismāʻīl Bukhārī (810-870), Muslim ibn al-Ḥajjāj al-Qushayrī (approximately 821-875)