قُل لِّلَّذِينَ كَفَرُوا إِن يَنتَهُوا يُغْفَرْ لَهُم مَّا قَدْ سَلَفَ وَإِن يَعُودُوا فَقَدْ مَضَتْ سُنَّتُ الْأَوَّلِينَ (38)
(8:38) [O Prophet!] Tell the unbelievers that if they desist from evil, their past shall be forgiven and if they revert to their past ways, then it is well known what happened with the people of the past.