﴿ وَإِذْ يَعِدُكُمُ ٱللَّهُ إِحْدَى ٱلطَّآئِفَتَيْنِ أَنَّهَا لَكُمْ وَتَوَدُّونَ أَنَّ غَيْرَ ذَاتِ ٱلشَّوْكَةِ تَكُونُ لَكُمْ وَيُرِيدُ ٱللَّهُ أَن يُحِقَّ ٱلْحَقَّ بِكَلِمَٰتِهِۦ وَيَقْطَعَ دَابِرَ ٱلْكَٰفِرِينَ ﴾

“And, lo, God gave you the promise that one of the two [enemy] hosts would fall to you: and you would have liked to seize the less powerful one, whereas it was God's will to prove the truth to be true in accordance with His words, and to wipe out the last remnant of those who denied the truth -”

Then, the same event has been alluded to in the second verse (6): يُجَادِلُونَكَ فِي الْحَقِّ بَعْدَ مَا تَبَيَّنَ كَأَنَّمَا يُسَاقُونَ إِلَى الْمَوْتِ وَهُمْ يَنظُرُ‌ونَ (they were disputing with you about the truth after it became clear, as if they were being driven to a death being seen by them). Though the noble Companions had not disobeyed any command given to them - in fact, what they had done was a certain expression of their weakness and lack of courage as part of their response when consulted. But, even such expression of personal opinion coming from the Companions of the Messengers of Allah when juxtaposed with the high station they were blessed with was unwelcome in the sight of Allah Ta` ala. Therefore, it was set forth in words which spell out displeasure.