Surah Ya-Sin — Ayah 10 (36:10)
وَسَوَآءٌ عَلَيۡهِمۡ ءَأَنذَرۡتَهُمۡ أَمۡ لَمۡ تُنذِرۡهُمۡ لَا يُؤۡمِنُونَ ١٠
English translation (Saheeh International)
And it is all the same for them whether you warn them or do not warn them - they will not believe.
Brief commentary
It is all the same to these disbelievers who oppose the truth, whether you, O Muhammad, warn them or you do not warn them. They will not accept what you have brought from Allah.