Surat At-Tawbah (44-45)

{لاَ يَسْتَأْذِنُكَ الَّذِينَ يُؤْمِنُونَ بِاللّهِ وَالْيَوْمِ الآخِرِ أَن يُجَاهِدُواْ بِأَمْوَالِهِمْ وَأَنفُسِهِمْ وَاللّهُ عَلِيمٌ بِالْمُتَّقِينَ} [التوبة: 44]

44- People who believe in Allah and in the Last Day do not seek your permission to lag behind because they consider Jihad a righteous deed which they should do to prove their love to martyrdom. So, they hasten to pay their money and selves for the sake of Allah, and Allah is All-Knowing of those who fear Him and seek His Pleasure from His Servants.

{إِنَّمَا يَسْتَأْذِنُكَ الَّذِينَ لاَ يُؤْمِنُونَ بِاللّهِ وَالْيَوْمِ الآخِرِ وَارْتَابَتْ قُلُوبُهُمْ فَهُمْ فِي رَيْبِهِمْ يَتَرَدَّدُونَ} [التوبة: 45]

45- Those who seek your permission to lag behind had no excuses because they did not believe in Allah, did not seek His Reward in the Hereafter, and their hearts were in doubt about the ordinances you brought them, so they were lost in their doubt.