This research aims to study the educational significance of the advent of an explicit noun and implicit noun in the Hadiths of al-Arba'in al-Nawawi which represents a problem among readers to understand deeply the meaning of Hadith. This research described an explicit noun and implicit noun and analyzed it from syntactic and educational semantic sides. The study has reached some results: An explicit noun indicated concern and care, signify specialization and honor. An implicit noun came to show concealment, to attract attention and proximity, to specialize and intensity of care and attention.