That ye believe in Allah and His Messenger, and that ye strive (your utmost) in the Cause of Allah, with your property and your persons: That will be best for you, if ye but knew! As-Saff 61:11 ⧉
Tafsir:
In trade, a man first invests and then receives a return on his investment. In the struggle for Faith also one has to invest his strength and his possessions. From this view point, this is also a sort of trade. But, one receives the profit from worldly trade in this world, while in the religion-oriented trade, one receives the profit with further additions only in the Hereafter.