Quran Al-Baqarah 2:6

إِنَّ ٱلَّذِينَ كَفَرُواْ سَوَآءٌ عَلَيۡهِمۡ ءَأَنذَرۡتَهُمۡ أَمۡ لَمۡ تُنذِرۡهُمۡ لَا يُؤۡمِنُونَ

Translation

Indeed, those who disbelieve - it is all the same for them whether you warn them or do not warn them - they will not believe.