The Sharia of Moses in the TORA
Part 2 - The 365 Prohibitions of the Tora
250 - WRONGING ONE ANOTHER IN BUSINESS
Leviticus 25:14 -- “And if you sell anything to your neighbor or buy from your neighbor's hand, you shall not oppress one another.”
The provisions of this commandment are explained in the fourth chapter of Baba Mezia.