this is a very good article.
http://www.booksandideas.net/Laughter-in-Islam.html
laughing while Muslim
When Ṣuhayb arrived from Mecca, he went to the Prophet and to Abū Bakr. He went into the Prophet’s home, complaining of pain in his eye, while eating dates. ‘Abū Ṣuhayb, you are treating the pain in your eye by eating dates?’ ‘But I’m using my good eye’. The Prophet roared with laughter. (al-Murāḥ fī l-muzāḥ, op. cit.,p. 19-20).
http://www.booksandideas.net/Laughter-in-Islam.html
laughing while Muslim
When Ṣuhayb arrived from Mecca, he went to the Prophet and to Abū Bakr. He went into the Prophet’s home, complaining of pain in his eye, while eating dates. ‘Abū Ṣuhayb, you are treating the pain in your eye by eating dates?’ ‘But I’m using my good eye’. The Prophet roared with laughter. (al-Murāḥ fī l-muzāḥ, op. cit.,p. 19-20).