﴿ مَا كَانَ لِأَهْلِ ٱلْمَدِينَةِ وَمَنْ حَوْلَهُم مِّنَ ٱلْأَعْرَابِ أَن يَتَخَلَّفُوا۟ عَن رَّسُولِ ٱللَّهِ وَلَا يَرْغَبُوا۟ بِأَنفُسِهِمْ عَن نَّفْسِهِۦ ۚ ذَٰلِكَ بِأَنَّهُمْ لَا يُصِيبُهُمْ ظَمَأٌۭ وَلَا نَصَبٌۭ وَلَا مَخْمَصَةٌۭ فِى سَبِيلِ ٱللَّهِ وَلَا يَطَـُٔونَ مَوْطِئًۭا يَغِيظُ ٱلْكُفَّارَ وَلَا يَنَالُونَ مِنْ عَدُوٍّۢ نَّيْلًا إِلَّا كُتِبَ لَهُم بِهِۦ عَمَلٌۭ صَٰلِحٌ ۚ إِنَّ ٱللَّهَ لَا يُضِيعُ أَجْرَ ٱلْمُحْسِنِينَ ﴾

“It does not behove the people of the [Prophet's] City and the bedouin [who live] around them to hold back from following God's Apostle, or to care for their own selves more than for him -for, whenever they suffer from thirst or weariness or hunger in God's cause, and whenever they take any step which confounds those who deny the truth, and whenever there comes to them from the enemy whatever may be destined for them -[whenever anything thereof comes to pass,,] a good deed is recorded in their favour. Verily, God does not fail to requite the doers of good!”

Commentary The two verses cited above admonish those who missed to join the expedition of Tabuk for no valid reason. They have also been told that they did what was not proper. Then the verses describe the merits of people who take part in Jihad and tell us about the great rewards they get for everything they do there. Included here is the causing of hurt or loss to the enemy and the using of a strategy that infuriates the adversary. All these are good deeds, and worthy of thawab (reward from Allah).