What does God forbid in the eighth commandment?

God forbids not only outright theft and robbery but also such wicked schemes and devices as false weights and measures, deceptive merchandising, counterfeit money, and usury; we must not defraud our neighbour in any way, whether by force or by show of right. In addition God forbids all greed and all abuse or squandering of His gifts.

Proofs

• God forbids not only outright theft and robbery (Exodus 22:1; 1 Corinthians 5:9–10; 1 Corinthians 6:9–10)
• but also such wicked schemes and devices as false weights and measures, deceptive merchandising, counterfeit money, and usury; (Deuteronomy 25:13–16; Psalm 15:5; Proverbs 11:1; Proverbs 12:22; Ezekiel 45:9–12; Luke 6:35)
• we must not defraud our neighbour in any way, whether by force or by show of right. (Micah 6:9–11; Luke 3:14; James 5:1–6)
• In addition God forbids all greed (Luke 12:15; Ephesians 5:5)
• and all abuse or squandering of His gifts. (Proverbs 21:20; Proverbs 23:20–21; Luke 16:10–13)