She said, "I never saw the Messenger of Allah ﷺ laughing so heartily that his uvula was visible. He would only smile." …the hadith.
أنها قالت: ما رأيت رسول الله ﷺ مستجمعا ضاحكا حتى أرى منه لهواته، إنما كان يبتسم… الحديث
Bukhari related it in the Tafsir (4828) and Muslim in the Kusuf (16:899), both through the route of Abdullah bin Wahb, from Amr bin Harith, that Abu Nadr told him, from Sulayman bin Yasar, from Ayesha, who narrated it.His saying, "mustajmian," means striving fully in it, intent upon it. His saying, "lahawatihi," the singular of which is "lahat," refers to the flesh that projects toward the throat at the very back of the mouth.