Commentary on the Forty Hadith of Imam al-Nawawi The Compendium of Knowledge and Wisdom is the translation by Abdassamd Clarke of the masterwork of Ibn Rajab al-Hanbali. It is a comprehensive collection of sciences and wisdom in commentary of fifty hadith (Including the ‘Forty’ of Imam An Nawwawi) from the concise comprehensive speech (Jawami’ al-Kalim) of the Messenger of Allah, may Allah bless him and grant him peace.