6 [a]Then the Lord spoke to Moses, saying, 2 “When a person sins and acts unfaithfully against the Lord, and deceives his companion in regard to a deposit or a security entrusted to him, or through robbery, or if he has extorted from his companion, 3 or has found what was lost and lied about it and sworn falsely, so that he sins in regard to any one of the things a man may do; 4 then it shall be, when he sins and becomes guilty, that he shall restore what he took by robbery or what he got by extortion, or the deposit which was [b]entrusted to him or the lost thing which he found, 5 or anything about which he swore falsely; he shall make restitution for it [c]in full and add to it one-fifth more. He shall give it to the one to whom it belongs on the day he presents his guilt offering. 6 Then he shall bring to the priest his guilt offering to the Lord, a ram without defect from the flock, according to your valuation, for a guilt offering, 7 and the priest shall make atonement for him before the Lord, and he will be forgiven for any one of the things which he may have done to incur guilt.”
While it seems the emphasis is on theft here, it is also about honesty, and being forthright in your dealings. You shouldn’t attempt to deceive people or hold back the truth for your own gain. Sometimes you can’t talk about something, but withholding information it for gain is sin, plain and simple. Best honest in your dealings, and let God take care of the rest.