﴿ وَمَا لَكُمْ أَلَّا تُنفِقُوا۟ فِى سَبِيلِ ٱللَّهِ وَلِلَّهِ مِيرَٰثُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ ۚ لَا يَسْتَوِى مِنكُم مَّنْ أَنفَقَ مِن قَبْلِ ٱلْفَتْحِ وَقَٰتَلَ ۚ أُو۟لَٰٓئِكَ أَعْظَمُ دَرَجَةًۭ مِّنَ ٱلَّذِينَ أَنفَقُوا۟ مِنۢ بَعْدُ وَقَٰتَلُوا۟ ۚ وَكُلًّۭا وَعَدَ ٱللَّهُ ٱلْحُسْنَىٰ ۚ وَٱللَّهُ بِمَا تَعْمَلُونَ خَبِيرٌۭ ﴾

“And why should you not spend freely in the cause of God, seeing that God’s [alone] is the heritage of the heavens and the earth? Not equal are those of you who spent and fought [in God’s cause] before the Victory [and those who did not do so]: they are of a higher rank than those who would spend and fight [only] after it - although God has promised the ultimate good to all [who strive in His cause]. and god is aware of that you do.”

When the call of Islam is given, it is based on clear reasoning in its preliminary stages. The second stage is marked by victory in its immediate surroundings. In the first stage, only those who have the capacity to see the inherent greatness of a thing solely on the level of reasoning are courageous enough to make sacrifices for Islam. But when Islam has already been crowned by success, every individual is able to see its greatness and everybody feels proud of coming forward and offering his life and property for its sake. One who spends for the cause of Islam in the early stages has to do it without thought of reward, while in the latter stage, whatever a man spends is redoubled in this world itself, as a reward in various forms. That explains why, in the eyes of God, each group has a different status.