عَن عائشةرضي اللَّهُ عَنْهَا قَالَتْ: مَا رَأَيْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مُسْتَجْمِعًا ضَاحِكًا حَتَّى أَرَى مِنْهُ لَهَوَاتِهِ إِنَّمَا كَانَ يتبسم. رَوَاهُ البُخَارِيّ
Aisha (may Allah be pleased with her) narrated: I never saw the Prophet (peace and blessings of Allah be upon him) laughing so heartily that I could see the uvula of his throat; he would only smile. Narrated by al-Bukhari.