From the Shorter Catechism

Q. 75. What is forbidden in the eighth commandment?

A. The eighth commandment forbiddeth whatsoever doth, or may, unjustly hinder our own, or our neighbor’s, wealth, or outward estate. Prov. 21:17; Prov. 23:20-21; Prov. 28:19; Eph. 4:28.