Quran 83:31 from Surah Al-Mutaffifin on Divine Marvels.
وَإِذَا ٱنقَلَبُوٓاْ إِلَىٰٓ أَهۡلِهِمُ ٱنقَلَبُواْ فَكِهِينَ
English translation: And when they returned to their people they would return jesting
Transliteration: wa-idha inqalabu ila ahlihimu inqalabu fakihina