وَسَوَآءٌ عَلَيْهِمْ ءَأَنذَرْتَهُمْ أَمْ لَمْ تُنذِرْهُمْ لَا يُؤْمِنُونَ

Wasawaon AAalayhim aanthartahumam lam tunthirhum la yu/minoon

And it is all the same for them whether you warn them or do not warn them - they will not believe.