Forty nuclear; An author contains forty -two, an honorable prophetic hadith, collected by Imam Al -Nawawi, who committed to collecting it to be correct, and the reasons for Al -Nawawi are the reason for his collection for the forty. And all of them are valid purposes, may God be pleased with its opponents. I saw the collection of forty more important than all of this, which is forty hadiths that include all of this, and each hadith is a great rule of religion, and scholars have described it as the orbit of Islam on it, or half of Islam or a third or so.