Surah Muhammad Verse 21

طَاعَةٌ وَقَوْلٌ مَعْرُوفٌ ۚ فَإِذَا عَزَمَ الْأَمْرُ فَلَوْ صَدَقُوا اللَّهَ لَكَانَ خَيْرًا لَهُمْ

Obedience and good words. And when the matter [of fighting] was determined, if they had been true to Allah, it would have been better for them