The Holy Quran 30:39 — Surah Ar-Rum
Arabic text
وَمَآ ءَاتَيْتُم مِّن رِّبًا لِّيَرْبُوَا۟ فِىٓ أَمْوَٰلِ ٱلنَّاسِ فَلَا يَرْبُوا۟ عِندَ ٱللَّهِ ۖ وَمَآ ءَاتَيْتُم مِّن زَكَوٰةٍ تُرِيدُونَ وَجْهَ ٱللَّهِ فَأُو۟لَـٰٓئِكَ هُمُ ٱلْمُضْعِفُونَ
Translation
Whatever interest (any sum of usury) you pay to increase people's wealth does not increase in Allaah's sight (because interest destroys the blessings of one's wealth even though the wealth seems to be increasing physically). (On the other hand) Whatever you pay as zakaah, seeking Allaah's pleasure, such people (who pay their zakaah) truly multiply (their rewards, even though their wealth seems to be physically decreasing).
Tafsir (excerpt) — Tafsir Usmani
Wealth decreases through usury and increases through zakat: that is, although through usury (riba, interest) wealth outwardly appears to increase, in reality it is diminishing — just as when a person's body swells with oedema, it is a disease or a message of death.
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