Qur'an 65:7

لِيُنفِقْ ذُو سَعَةٍ مِّن سَعَتِهِۦ ۖ وَمَن قُدِرَ عَلَيْهِ رِزْقُهُۥ فَلْيُنفِقْ مِمَّآ ءَاتَىٰهُ ٱللَّهُ ۚ لَا يُكَلِّفُ ٱللَّهُ نَفْسًا إِلَّا مَآ ءَاتَىٰهَا ۚ سَيَجْعَلُ ٱللَّهُ بَعْدَ عُسْرٍ يُسْرًا

Let him who hath abundance spend of his abundance, and he whose provision is measured, let him spend of that which Allah hath given him. Allah asketh naught of any soul save that which He hath given it. Allah will vouchsafe, after hardship, ease.