Creditors: Prohibited From: Exacting Usury from Brethren
Source: TTT
Exodus 22:25
If you lend money to one of My people among you who is poor, you must not act as a creditor to him; you are not to charge him interest.
Leviticus 25:36, 37
Do not take any interest or profit from him, but fear your God, that your countryman may live among you. / You must not lend him your silver at interest or sell him your food for profit.