Salmos 15
Ambrose of Milan · Comentário Patrístico (catena)
Salmos 15:2
In everything, therefore, good faith is seemly, justice is pleasing, due measure in equity is delightful. But what shall I say about contracts, and especially about the sale of land, or agreements or covenants? Are there not rules just for the purpose of shutting out all false deceit and to make him whose deceit is found out liable to double punishment? Everywhere, then, does regard for what is virtuous take the lead; it shuts out deceit, it expels fraud. Wherefore the prophet David has rightly stated his judgment in general, saying, "He has done no evil to his neighbor." Fraud, then, ought to be wanting not only in contracts, in which the defects of those things that are for sale are ordered to be recorded (which contracts, unless the vendor has mentioned the defects, are rendered void by an action for fraud, although he has conveyed them fully to the purchaser), but it ought also to be absent in all else. Candor must be shown, the truth must be made known. — On the Duties of the Clergy 3.10.66
Salmos 15:5
What is more cruel than to lend money to one who has none and then to exact double the amount? If one cannot pay the simple amount, how will he pay double?… Nations have often failed because of usury, and this has been the cause of public calamity. — Letter 19: To Vigilius