الأربعون النووية

Al-Nawawi's Forty is a book that contains forty noble hadiths, collected by Imam Al-Nawawi, who committed to collecting them to be authentic.

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