At-Tawbah 9:66

لَا تَعْتَذِرُوا۟ قَدْ كَفَرْتُم بَعْدَ إِيمَـٰنِكُمْ ۚ إِن نَّعْفُ عَن طَآئِفَةٍ مِّنكُمْ نُعَذِّبْ طَآئِفَةًۢ بِأَنَّهُمْ كَانُوا۟ مُجْرِمِينَ

Lā taʿtadhirū qad kafartum baʿda īmānikum in naʿfu ʿan ṭāifatin minkum nuʿadhib ṭāifatan bi-annahum kānū muj'rimīna

Make no excuse; you have disbelieved [i.e., rejected faith] after your belief. If We pardon one faction of you - We will punish another faction because they were criminals.