From the Shorter Catechism

Q. 80. What is required in the tenth commandment?

A. The tenth commandment requireth full contentment with our own condition, with a right and charitable frame of spirit toward our neighbor, and all that is his. Heb. 13:5; 1 Tim. 6:6; Job 31:29; Rom. 12:15; 1 Tim. 1:5; 1 Cor. 13:4-7.