Al-Kāfi

Hadith 2284
humorheedlessness
7ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ النَّوْفَلِيِّ عَنِ السَّكُونِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ إِنَّ مِنَ الْجَهْلِ الضَّحِكَ مِنْ غَيْرِ عَجَبٍ قَالَ وَكَانَ يَقُولُ لا تُبْدِيَنَّ عَنْ وَاضِحَةٍ وَقَدْ عَمِلْتَ الأعْمَالَ الْفَاضِحَةَ وَلا يَأْمَنِ الْبَيَاتَ مَنْ عَمِلَ السَّيِّئَاتِ.
7. Ali ibn Ibrahim has narrated from his father from al-Nawfali from al-Sakuni from Abu ‘Abdillah (a.s.) who has said the following: “Abu ‘Abd Allah (a.s.) has said, ‘It is ignorance to laugh without astonishment.’ The narrator has said that the Imam would say, ‘In laughing do not allow your teeth to become visible, when you have committed disgraceful deeds. One who has committed evil deeds should not feel secure about what kinds of misfortune the night may bring.”’
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī