The Saheeh International Quran Translation
وَسَوَآءٌ عَلَيْهِمْ ءَأَنذَرْتَهُمْ أَمْ لَمْ تُنذِرْهُمْ لَا يُؤْمِنُونَ
تجهيز للطباعة
And it is all the same for them whether you warn them or do not warn them - they will not believe.