Sanad is an important part of the ḥadīth. The existence of a ḥadīth that is contained in the various books must be examined a quality of his sanad. In other words, the quality of sanad of ḥadīth is able to determine if the ḥadīth that can be accepted or rejected.
This thesis discusses the quality of ḥadīth about reducing laugh in Tanqīḥ al-Qaul al-Ḥathīth by Imām al-Nawawī al-Bantanī especially ḥadīth in an introduction. The ḥadīth used by Imām al-Nawawī al-Bantanī has been containing do not use sanad and not include matan completely.
The problem of this research is defined as follows: 1) What is the quality of sanad and matan of ḥadīth about reducing laugh in Tanqīh al- Qaul al-Ḥathīth especially in the introduction. 2) What is the implementation of ḥadīth about Reduce Laughs in our life now?. This research was qualitative in based on the study of librarianship (library research) and in the data processing used documentation method, i.e. looking for data in the form of a note, transcript, book, and so on.
The results of this research can be concluded, if seen as a whole in terms of sanad and matan, there is so many of ḥadīth in ḍa’if quality. However, in relation to health, laughter can be used as therapy for healing various diseases. For example, laughing as ageless remedies, anti stress, strengthen the immune system, laughing can prevent high blood pressure; a good laugh can prevent heart disease and so on.