Surah At-Taubah (The Repentance), Verse 66

لَا تَعْتَذِرُوْا قَدْ كَفَرْتُمْ بَعْدَ اِیْمَانِكُمْ اِنْ نَّعْفُ عَنْ طَآىِٕفَةٍ مِّنْكُمْ نُعَذِّبْ طَآىِٕفَةًۢ بِاَنَّهُمْ كَانُوْا مُجْرِمِیْنَ 

Laa ta'taziroo qad kafartum ba'da eemaanikum; in na'fu 'an taaa'ifatin minkum nu'az zib taaa'ifatan bi annahum kaanoo mujrimeen

“Make ye no excuses: ye have rejected Faith after ye had accepted it. If We pardon some of you, We will punish others amongst you, for that they are in sin.”

Quran 9:66 (Yusuf Ali Translation)