John Gill - Exposition
John Gill
He that by usury and unjust gain increaseth his substance,.... By biting and oppressing the poor; letting him have money at an exorbitant interest, and goods at an exorbitant price, and so increases his substance in this scandalous manner; hence usury is in Leviticus 25:36, called "increase", and by the Greeks τοκος, a "birth", because money is the birth of money, as Aristotle (e) observes; and...