John Gill Commentary Leviticus 25:36

"Take thou no interest of him or increase, but fear thy God; that thy brother may live with thee." — Leviticus 25:36 (ASV)

Take you no usury of him, or increase
Not only give him somewhat for his present relief, but lend him money to put him in a way of business, to get his living for the future, without requiring any interest for it; (See Gill on Exodus 22:25);

but fear your God ;
who has given this command, and expects to be obeyed; and who is good, and does good, and should be feared for his goodness' sake; and is omniscient, and knows what is secretly exacted, and will not suffer any exorbitance of this kind to pass unpunished:

that your brother may live with you ;
which it would be still more difficult for him to do, should usury and increase be taken of him.