3-Surah Al-Imran ( The Family of Imran ) 130
O you who have believed, do not consume usury, doubled and multiplied, but fear Allah that you may be successful.
يَا أَيُّهَا الَّذِينَ آمَنُوا لَا تَأْكُلُوا الرِّبَا أَضْعَافًا مُّضَاعَفَةً ۖ وَاتَّقُوا اللَّهَ لَعَلَّكُمْ تُفْلِحُونَ
Quran's Tafhim ( explanation)
*98). The major cause of the setback suffered at Uhud was that precisely at the moment of their victory the Muslims succumbed to the desire for worldly possessions, and turned to collecting booty rather than completing their task of crushing the enemy. Hence God thought fit to raise a barrier against this excessive adoration of money, and to urge them to give up usury which keeps man constantly absorbed in considering ways and means of amassing wealth and generally whets his appetite for money.