Surat Muĥammad - سورة محمد

طَاعَةٌ وَقَوْلٌ مَّعْرُوفٌ ۚ فَإِذَا عَزَمَ الْأَمْرُ فَلَوْ صَدَقُوا اللَّهَ لَكَانَ خَيْرًا لَّهُمْ

Muhsin Khan: Obedience (to Allah) and good words (were better for them). And when the matter (preparation for Jihad) is resolved on, then if they had been true to Allah, it would have been better for them.