Surah Ali 'Imran Verse 177

إِنَّ الَّذِينَ اشْتَرَوُا الْكُفْرَ بِالْإِيمَانِ لَنْ يَضُرُّوا اللَّهَ شَيْئًا وَلَهُمْ عَذَابٌ أَلِيمٌ

Indeed, those who purchase disbelief [in exchange] for faith - never will they harm Allah at all, and for them is a painful punishment