﴿ قُل لِّلَّذِينَ كَفَرُوٓا۟ إِن يَنتَهُوا۟ يُغْفَرْ لَهُم مَّا قَدْ سَلَفَ وَإِن يَعُودُوا۟ فَقَدْ مَضَتْ سُنَّتُ ٱلْأَوَّلِينَ ﴾

“Tell those who are bent on denying the truth that if they desist, all that is past shall be forgiven them; but if they revert [to their wrongdoing], let them remember what happened to the like of them in times gone by.”

(Tell) O Muhammad, (those who disbelieve) Abu Sufyan and his host (that if they cease) disbelief, idolatry, idol worship and fighting Muhammad (pbuh) (that which is past) of disbelief, idolatry, idol worship and fighting against the Prophet (pbuh) (will be forgiven them; but if they return (thereto)) i.e. to fighting Muhammad (pbuh) (then the example of the men of old hath already gone) that victory is given to Allah's friends against their enemies, such as was the case on the Day of Badr.