Concept:An-Nawawi's collection, known as Al-Arba'in, is a famous compilation of key hadiths; one of its numbered entries specifically forbids poking one's nose into other people's affairs.
Explanation:Poking one's nose means interfering or prying into matters that do not concern a person.
The Prophet (peace be upon him) commanded Muslims to avoid useless meddling.
An-Nawawi arranged these hadiths under numbered entries for easy study and memorization.
The relevant warning is found in Hadith number 12 of the collection.
In this hadith, the Prophet (peace be upon him) says: "Part of the perfection of one's Islam is leaving alone that which does not concern him."
A true Muslim should therefore mind his own business and avoid meddling in the private affairs of others.
This teaching corresponds to An-Nawawi's twelfth entry, not the sixth, eighth, or fourth.
So the option that correctly completes the statement is twelve.
Answer:C. twelve