Deut 25, 13-16 Who is dishonest is an abomination

Deuteronomy 25 (chosen pages)

(Deut 25, 13-16) Who is dishonest is an abomination

[13] You shall not keep two differing weights in your bag, one large and the other small; [14] nor shall you keep two different measures in your house, one large and the other small. [15] But use a true and just weight, and a true and just measure, that you may have a long life on the land which the LORD, your God, is giving you. [16] Everyone who is dishonest in any of these matters is an abomination to the LORD, your God.

(CCC 2409) Even if it does not contradict the provisions of civil law, any form of unjustly taking and keeping the property of others is against the seventh commandment: thus, deliberate retention of goods lent or of objects lost; business fraud; paying unjust wages; forcing up prices by taking advantage of the ignorance or hardship of another (Cf. Deut 25:13-16; 24:14-15; Jas 5:4; Am 8:4-6). The following are also morally illicit: speculation in which one contrives to manipulate the price of goods artificially in order to gain an advantage to the detriment of others; corruption in which one influences the judgment of those who must make decisions according to law; appropriation and use for private purposes of the common goods of an enterprise; work poorly done; tax evasion; forgery of checks and invoices; excessive expenses and waste. Willfully damaging private or public property is contrary to the moral law and requires reparation.