Ali 'Imran 3:106

Yawma tabyaddu wujoohun wataswadduwujoohun faamma allatheena iswaddat wujoohuhumakafartum baAAda eemanikum fathooqoo alAAathababima kuntum takfuroon

On the Day [some] faces will turn white and [some] faces will turn black. As for those whose faces turn black, [to them it will be said], "Did you disbelieve [i.e., reject faith] after your belief? Then taste the punishment for what you used to reject."

on a day when some faces shall turn bright, and some faces shall turn dark. As for those whose faces turn dark, (they shall be questioned): “Did you disbelieve after you had accepted the Faith? Now taste the punishment, because you used to disbelieve.”