(68) باب التَّبَسُّمِ وَالضَّحِكِ
Narrated `Aisha:
I never saw the Prophet (ﷺ) laughing to an extent that one could see his palate, but he always used to smile only.
Reference: Sahih al-Bukhari 6092
In-book reference: Book 78, Hadith 119
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 73, Hadith 114