The second verse that follows gives consolation to Muslims from another angle. It has been said that if Muslims were wounded or hurt in that particular battle, so also were those fighting against them. If seventy Muslim men were martyred with many wounded, is it not that they had condemned an identical number of their enemies to Hell, and wounded many, a year ago? Then, in this very battle, many a men from the enemy ranks were killed and wounded initially. So, when the text says:
إِن يَمْسَسْكُمْ قَرْحٌ فَقَدْ مَسَّ الْقَوْمَ قَرْحٌ مِّثْلُهُ ۚ وَتِلْكَ الْأَيَّامُ نُدَاوِلُهَا بَيْنَ النَّاسِ
If you receive a wound, they have received a similar wound. And such days we rotate among the people..
It guides us to another important principle and rule of procedure.
In this mortal world, the customary practice of Allah Almighty is to cause the days of hardship and ease, pain and comfort, suffering and peace occur among people by turns. If, for some reason, a falsely-motivated power succeeds in getting a short-lived upper hand, the group motivated by the truth should not lose heart and come to think that, from this point onwards, they are always doomed to nothing but defeat. Instead of taking this negative attitude, they should rather go about finding out the causes of that defeat, and once they have discovered those, they should take corrective measures and eliminate all possibilities of repeating those mistakes. In the end, the group motivated by the truth shall emerge as the ultimate victor.