Al-Baqara · 2:276

but God has allowed trade and forbidden usury. Whoever, on receiving God’s warning, stops taking usury may keep his past gains- God will be his judge- but whoever goes back to usury will be an inhabitant of the Fire, there to remain. God blights usury, but blesses charitable deeds with multiple increase: He does not love the ungrateful sinner

Word-by-word analysis is only wired up for the demo verses (1:1 and 1:2) for now.