Sura al-Nisāʾ 4:66

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

wa-law annā katabnā ʿalayhim ani iqtulū anfusakum awi akhrujū min diyārikum mā faʿalūhu illā qalīlun minhum wa-law annahum faʿalū mā yūʿaẓūna bihi la-kāna khayran lahum wa-ashadda tathbītan

If We had ordered them to sacrifice their lives or to leave their homes, very few of them would have done it: But if they had done what they were (actually) told, it would have been best for them, and would have gone farthest to strengthen their (faith);