Leviticus 25:36

Take no usury of him That is, of thy brother, whether he be Israelite or proselyte. Or increase All kinds of usury are in this case forbidden, whether of money, or of victuals, or of any thing that is commonly lent by one man to another upon usury, or upon condition of receiving the thing lent with advantage and overplus. If one borrow in his necessity, there can be no doubt this law is binding still. But it cannot be thought to bind where money is borrowed for purchase of lands, trade, or other improvements. For there it is reasonable that the lender should share with the borrower in the profit.