Surah An-Nisa 4:66

وَلَوْ أَنَّا كَتَبْنَا عَلَيْهِمْ أَنِ ٱقْتُلُوٓا۟ أَنفُسَكُمْ أَوِ ٱخْرُجُوا۟ مِن دِيَـٰرِكُم مَّا فَعَلُوهُ إِلَّا قَلِيلٌ مِّنْهُمْ ۖ وَلَوْ أَنَّهُمْ فَعَلُوا۟ مَا يُوعَظُونَ بِهِۦ لَكَانَ خَيْرًا لَّهُمْ وَأَشَدَّ تَثْبِيتًا

And if We had decreed upon them, "Kill yourselves" or "Leave your homes," they would not have done it, except for a few of them. But if they had done what they were instructed, it would have been better for them and a firmer position [for them in faith].

Translation: Saheeh International

Tafsir

And had We prescribed for them the particle an ‘that’ is explicative ‘Slay yourselves’ or ‘Leave your habitations’ as We did for the Children of Israel they would not have done it that is what has been prescribed for them save a few read nominative qalīlun as a substitution; …

Excerpt from Tafsir al-Jalalayn, commentary on 4:66, via Quran.com. The reader has the full commentary and 9 more tafsirs.