Most of the polytheists of Mecca, and the Jews of Medina were merchants and lived in affluence and opulence. While the Muslims due to their especial case and critical situation, and also their emigration or being expelled from their homes and habitations, lived in poverty, hardship and serious necessities. Comparing these two groups of rich and poor people raised the question that; why should a believer who is supposed to be a friend of God, live in such that needs and hardship while his opponent is drowned in luxuriencies and affluence? To give an answer to this common question the verses revealed.