Surah Ya-Sin, Verse 10

وَسَوَآءٌ عَلَيۡهِمۡ ءَأَنذَرۡتَهُمۡ أَمۡ لَمۡ تُنذِرۡهُمۡ لَا يُؤۡمِنُونَ١٠

wasawāon ʿalayhim a-andhartahum am lam tundhir'hum lā yu'minūna

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