Surah Al-Mu'minun, Ayah 53
Quran 23:53 · The Believers · Makki · Para 18 · Page 345
فَتَقَطَّعُوْۤا اَمْرَهُمْ بَیْنَهُمْ زُبُرًا ؕ كُلُّ حِزْبٍۭ بِمَا لَدَیْهِمْ فَرِحُوْنَ ۟
Transliteration
FataqattaAAoo amrahum baynahumzuburan kullu hizbin bima ladayhim farihoon
Saheeh International
But they [i.e., the people] divided their religion among them into portions [i.e., sects] - each faction, in what it has, rejoicing.
Al-Mukhtasar fi Tafsir
After they passed away, their followers were divided in religion and became sects and groups, with each group conceited in believing that whatever it believed in was the true acceptable religion according to Allah, disregarding the views of anyone else.
Tafsir Ibn Kathir (abridged)
Explains 23:51–23:56 together — read it on 23:51