The Nawawi Forty is a book that contains forty-two noble prophetic hadiths that were collected by: Imam al-Nawawi and committed to collecting them to be authentic hadiths, and Imam al-Nawawi mentioned the reason for his collection of the forty, and he said:

“Among the scholars who gathered forty in the fundamentals of religion, some of them in branches, some in jihad, some in asceticism and some in sermons, and all of them are valid purposes, may God be pleased with those who intended it. And I have seen a collection of forty more important than all of this, and it is forty hadiths that include all of that, and each hadith of them is a great rule of the rules of religion, and scholars have described it as the orbit of Islam on it, or half of Islam or a third of it or so.