'Usurer' in the Bible

'If thou dost lend My poor people with thee money, thou art not to him as a usurer; thou dost not lay on him usury;

And it hath been -- as a people so a priest, As the servant so his master, As the maid-servant so her mistress, As the buyer so the seller, As the lender so the borrower, As the usurer so he who is lifting it on himself.