اقرأ وتدبر الآية 1321 من سورة سُورَةُ التَّوۡبَةِ: وَإِذَا أُنْزِلَتْ سُورَةٌ أَنْ آمِنُوا بِاللَّهِ وَجَاهِدُوا مَعَ رَسُولِهِ اسْتَأْذَنَكَ أُولُو الطَّوْلِ مِنْهُمْ وَقَالُوا ذَرْنَا نَكُنْ مَعَ الْقَاعِدِينَ
وَإِذَا أُنْزِلَتْ سُورَةٌ أَنْ آمِنُوا بِاللَّهِ وَجَاهِدُوا مَعَ رَسُولِهِ اسْتَأْذَنَكَ أُولُو الطَّوْلِ مِنْهُمْ وَقَالُوا ذَرْنَا نَكُنْ مَعَ الْقَاعِدِينَ
[They are indeed denying it:] for, when they were called upon through revelation, "Believe in God, and strive hard [in His cause] together with His Apostle," [even] such of them as were well able [to go to war] asked thee for exemption, saying, "Allow us to stay behind with those who remain at home!"