Quran 4, An-Nisa (the Women) ⓘ

4:137Lo! those who believe, then disbelieve and then (again) believe, then disbelieve, and then increase in disbelief, Allah will never pardon them, nor will He guide them unto a way.

إِنَّ الَّذِينَ آمَنُوا ثُمَّ كَفَرُوا ثُمَّ آمَنُوا ثُمَّ كَفَرُوا ثُمَّ ازْدَادُوا كُفْرًا لَمْ يَكُنِ اللَّهُ لِيَغْفِرَ لَهُمْ وَلَا لِيَهْدِيَهُمْ سَبِيلًا