Dr. Mustafa Khattab, the Clear Quran - Surah Ad-Dukhan, ayah 9

Translation of Surah Ad-Dukhan, ayah 9 (44:9)

بَلۡ هُمۡ فِي شَكّٖ يَلۡعَبُونَ ٩
In fact, they are in doubt, amusing themselves.