Quran 9:41. Go forth, whether light or heavy, and strive with your wealth and your lives in the cause of God. That is better for you, if you only knew. 42. Had it been a near [i.e., easy] gain and a moderate trip, they [i.e., the hypocrites] would have followed you, but distant to them was the journey. And they will swear by God, “If we were able, we would have gone forth with you,” destroying themselves [through false oaths], and God knows that indeed they are liars. … 44. Those who believe in God and the Last Day would not ask permission of you to be excused from striving [i.e., fighting] with their wealth and their lives.