Quran 3:177

إِنَّ ٱلَّذِينَ ٱشۡتَرَوُاْ ٱلۡكُفۡرَ بِٱلۡإِيمَـٰنِ لَن يَضُرُّواْ ٱللَّهَ شَيۡـًٔ۬ا وَلَهُمۡ عَذَابٌ أَلِيمٌ۬ ١٧٧

Those who choose disbelief, instead of belief, do not hurt ALLAH in the least; they have incurred a painful retribution.