3 : 177
إِنَّ ٱلَّذِينَ ٱشۡتَرَوُاْ ٱلۡكُفۡرَ بِٱلۡإِيمَٰنِ لَن يَضُرُّواْ ٱللَّهَ شَيۡـٔٗاۖ وَلَهُمۡ عَذَابٌ أَلِيمٞ
Those who purchase disbelief [in exchange] for faith can never harm Allah in the least, and for them there will be a painful punishment.