Quran 9:82

فَلۡيَضۡحَكُواْ قَلِيلاً۬ وَلۡيَبۡكُواْ كَثِيرً۬ا جَزَآءَۢ بِمَا كَانُواْ يَكۡسِبُونَ ٨٢

Let them laugh a little, and cry a lot. This is the requital for the sins they have earned.