The Quran

يا أَيُّهَا الَّذينَ آمَنوا ما لَكُم إِذا قيلَ لَكُمُ انفِروا في سَبيلِ اللَّهِ اثّاقَلتُم إِلَى الأَرضِ ۚ أَرَضيتُم بِالحَياةِ الدُّنيا مِنَ الآخِرَةِ ۚ فَما مَتاعُ الحَياةِ الدُّنيا فِي الآخِرَةِ إِلّا قَليلٌ

Mir Aneesuddin

O you who believe ! what is (the matter) with you, that when it is said to you to go out in the way of Allah (to Tabuk)¹, you cling heavily to the earth. Are you more pleased with the life of this world compared to the hereafter? Then the provision of the life of this world compared to the hereafter is but little.

Expedition of Tabuk (H. 9): There were many hindrances for the raising of an army sufficient to face the strong forces of the Roman Emperor.
1. Great drought. 2. The length of the journey/to the confines of Syria. 3. Ripening of the fruits which were ready to be plucked. 4. Hot weather and 5. Organised Roman army. The prophet (PBH) led an army of 30,000 muslims which reached the borders of Syria, but the enemy surrendered without war.