﴿ لَن تَنَالُوا۟ ٱلْبِرَّ حَتَّىٰ تُنفِقُوا۟ مِمَّا تُحِبُّونَ ۚ وَمَا تُنفِقُوا۟ مِن شَىْءٍۢ فَإِنَّ ٱللَّهَ بِهِۦ عَلِيمٌۭ ﴾

“[But as for you, O believers,] never shall you attain to true piety unless you spend on others out of what you cherish yourselves; and whatever you spend - verily, God has full knowledge thereof.”

You will not attain piety that is the reward for it which is Paradise until you expend until you give voluntary alms of what you love of your wealth; and whatever thing you expend God knows of it and He will requite it accordingly.