'Shortchanging' in the Bible

and who are saying, "When will the New Moon fade so we may sell grain, and the Sabbath conclude so we may market winnowed wheat? shortchanging the measure, raising the price, falsifying the scales by treachery,

For we are not like many, [acting like merchants] peddling God’s word [shortchanging and adulterating God’s message]; but from pure [uncompromised] motives, as [commissioned and sent] from God, we speak [His message] in Christ in the sight of God.