Al-Anfal 8:38

Qul lillatheena kafaroo in yantahooyughfar lahum ma qad salafa wa-in yaAAoodoo faqad madatsunnatu al-awwaleen

Say to those who have disbelieved [that] if they cease, what has previously occurred will be forgiven for them. But if they return [to hostility] - then the precedent of the former [rebellious] peoples has already taken place.

Say to those who disbelieve that if they desist (from infidelity), they shall be forgiven for what has passed (of their sins), and if they repeat, then, the precedent of the earlier people is already established (that the infidels are punished).