'Aishah (May Allah be pleased with him) reported:
I have never seen Messenger of Allah (ﷺ) laughing so heartily that his uvula could be seen. He used to smile only.[Al-Bukhari and Muslim]. (AR)
App reference (AR): Book 2, Hadith 23 (AR)
Arabic/English book reference (AR): Book 2, Hadith 703 (AR)