Bible verses about Interest
(From Nave's Topical Bible)

-(Income from loaning money, usually called "usury" in the Scriptures, but not generally signifying unlawful or unjust rates) Exodus 22:25; Leviticus 25:36, 37; Deuteronomy 23:19, 20; Nehemiah 5:1-13; Psalms 15:5; Proverbs 28:8; Ezekiel 18:8, 9, Isaiah 24:2; 13, 17; 22:12 -See BORROWING -See DEBT -See DEBTORS -See LENDING -See MONEY