﴿ وَلَوْ أَنَّا كَتَبْنَا عَلَيْهِمْ أَنِ ٱقْتُلُوٓا۟ أَنفُسَكُمْ أَوِ ٱخْرُجُوا۟ مِن دِيَٰرِكُم مَّا فَعَلُوهُ إِلَّا قَلِيلٌۭ مِّنْهُمْ ۖ وَلَوْ أَنَّهُمْ فَعَلُوا۟ مَا يُوعَظُونَ بِهِۦ لَكَانَ خَيْرًۭا لَّهُمْ وَأَشَدَّ تَثْبِيتًۭا ﴾

“Yet if We were to ordain for them, "Lay down your lives," or, "Forsake your homelands," only a very few of them would do it - although, if they did what they are admonished to do, it would indeed be for their own good and apt to strengthen them greatly [in faith],”

Please check ayah 4:70 for complete tafsir.