From here they adduced: One who lends on interest is guilty of five transgressions: "You shall not give," "You shall not take," "You shall not impose interest upon him," "You shall not be as a creditor to him," (Leviticus 19:14) "You shall not place a stumbling block before the blind man." Just as the lender and the borrower transgress, so, the guarantor, the witnesses, and the scribe. R. Meir excludes the scribe.