Collection Of Forty Hadiths on the Memorable Qualities of the Mothers of the Believers - by Abd ar-Rahman Ibn 'Asakir. 

Beginning with biographical notes on the wives of the Prophet (may Allah bless him and grant him peace), Ibn 'Asakir takes the reader through a remarkable collection of hadith describing the virtues of the 'Mothers of the Believers', an appellation invested on the wives of the Prophet (may Allah bless him and grant him peace) by the Qur'anic text itself.

Abd Ar-Rahman Ibn 'Asakir

Born in a scholarly Damascene family in the 6th century (Hijri), Ibn 'Asakir became an accomplished jurist, hadith specialist, and a prolific author. His learning had a profound effect on him and he was noted for his asceticism, devotion and tearfulness.