طَاعَةٌ وَقَوْلٌ مَّعْرُوفٌBut it was better for them, obedience and good words.which means that it would have been better for them to listen and obey in that present situation.فَإِذَا عَزَمَ الاْإَمْرُWhen the matter (of fighting) is resolved.which means when the situation becomes serious and the time of fighting truly arrives.فَلَوْ صَدَقُوا اللَّهَif they had been true to Allah,meaning, by making their intentions sincerely for Him.لَكَانَ خَيْرًا لَّهُمْit would have been better for them.Allah then says