﴿ وَلَا يَحْسَبَنَّ ٱلَّذِينَ يَبْخَلُونَ بِمَآ ءَاتَىٰهُمُ ٱللَّهُ مِن فَضْلِهِۦ هُوَ خَيْرًۭا لَّهُم ۖ بَلْ هُوَ شَرٌّۭ لَّهُمْ ۖ سَيُطَوَّقُونَ مَا بَخِلُوا۟ بِهِۦ يَوْمَ ٱلْقِيَٰمَةِ ۗ وَلِلَّهِ مِيرَٰثُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ ۗ وَٱللَّهُ بِمَا تَعْمَلُونَ خَبِيرٌۭ ﴾

“AND THEY should not think - they who niggardly cling to all that God has granted them out of His bounty - that this is good for them: nay, it is bad for them. That to which they [so] niggardly cling will, on the Day of Resurrection, be hung about their necks: for unto God [alone] belongs the heritage of the heavens and of the earth; and God is aware of all that you do.”

One comes to be called a believer by just repeating some words (kalimah), but so far as God is concerned, the would-be Muslim becomes a believer only when he sacrifices his life and his wealth for His cause. Without such a sacrifice, nobody’s faith is credible in the eyes of God. One thinks that by safeguarding one’s money one is safeguarding one’s worldly future. But man’s real future is that which pertains to the Hereafter. And money amassed for worldly purposes will only prove to be a curse for the hoarder.