Deuteronomy 25:16
For everyone who behaves dishonestly in regard to these things is detestable to the LORD your God.
What it says
Those who act dishonestly in such matters are detestable to the Lord.
What it is doing
It names deceit in trade as morally abhorrent before God.
In context
13You shall not have two differing weights in your bag, one heavy and one light. 14You shall not have two differing measures in your house, one large and one small. 15You must maintain accurate and honest weights and measures, so that you may live long in the land that the LORD your God is giving you. 16For everyone who behaves dishonestly in regard to these things is detestable to the LORD your God.