﴿ إِنَّ ٱلَّذِينَ كَفَرُوا۟ سَوَآءٌ عَلَيْهِمْ ءَأَنذَرْتَهُمْ أَمْ لَمْ تُنذِرْهُمْ لَا يُؤْمِنُونَ ﴾

“BEHOLD, as for those who are bent on denying the truth - it is all one to them whether thou warnest them or dost not warn them: they will not believe.”

(As for the disbelievers) who remain firm in their disbelief, (whether thou warn them), instil fear into them by means of the Qur'an, (or thou warm them not) or you do not instil fear into them, (it is all one for them; they believe not), they do not want to believe. It is also said that they will not believe as it is in Allah's knowledge.