إِنَّ الَّذِينَ كَفَرُواْ سَوَاءٌ عَلَيْهِمْ أَأَنذَرْتَهُمْ أَمْ لَمْ تُنذِرْهُمْ لاَ يُؤْمِنُونَ
[2:6]
Surely those who disbelieve, it being alike to them whether you warn them, or do not warn them, will not believe.
As to those who reject Faith, it is the same to them whether thou warn them or do not warn them; they will not believe.
As for the Disbelievers, Whether thou warn them or thou warn them not it is all one for them; they believe not.