Ali 'Imran 3:90

Inna allatheena kafaroo baAAda eemanihimthumma izdadoo kufran lan tuqbala tawbatuhum waola-ikahumu addalloon

Indeed, those who disbelieve [i.e., reject the message] after their belief and then increase in disbelief - never will their [claimed] repentance be accepted, and they are the ones astray.

Those who disbelieve after having accepted Faith and then increase in disbelief, their repentance shall never be accepted. They are the ones who have lost the right path.