Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:83:31 –

And when they returned to their people, they would return jesting.  

and when they returned to their folks they would return blithely (fākihīna: a variant reading has fakihīna), rejoicing in their ˹disparaging˺ mention of the believers;
القرآن:٨٣:٣١ –

وَإِذَا انْقَلَبُوا إِلَىٰ أَهْلِهِمُ انْقَلَبُوا فَكِهِينَ  

{وإذا انقلبوا} رجعوا {إلى أهلهم انقلبوا فاكهين} وفي قراءة فكهين معجبين بذكرهم المؤمنين.

See similar narrations below:

Collected by Qurʾān