47:21
طَاعَةٌ وَقَوْلٌ مَّعْرُوفٌ ۚ فَإِذَا عَزَمَ ٱلْأَمْرُ فَلَوْ صَدَقُوا۟ ٱللَّهَ لَكَانَ خَيْرًا لَّهُمْ
ṭāʿatun waqawlun maʿrūfun fa-idhā ʿazama l-amru falaw ṣadaqū l-laha lakāna khayran lahum
would be obedience and fitting words; it would also be better for them to be true to God when the decision to fight has been made.
Obedience (to Allâh) and good words (were better for them). And when the matter (preparation for Jihâd ) is resolved on, then if they had been true to Allâh, it would have been better for them.