Al Baqarah, 6 Ayah
2:6
إِنَّ ٱلَّذِينَ كَفَرُواْ سَوَآءٌ عَلَيۡهِمۡ ءَأَنذَرۡتَهُمۡ أَمۡ لَمۡ تُنذِرۡهُمۡ لَا يُؤۡمِنُونَ ٦
'Inna Al-Ladhīna Kafarū Sawā'un `Alayhim 'A 'Andhartahum 'Am Lam Tundhirhum Lā Yu'uminūna
Indeed, those who disbelieve - it is all the same for them whether you warn them or do not warn them - they will not believe.