Q: Which is the tenth commandment?
A: The tenth commandment is, Thou shalt not covet thy neighbour’s house, thou shalt not covet thy neighbour’s wife, nor his manservant, nor his maidservant, nor his ox, nor his ass, nor any thing that is thy neighbour’s.

Q: 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 neighbour, and all that is his.

Q: What is forbidden in the tenth commandment?
A: The tenth commandment forbiddeth all discontentment with our own estate, envying or grieving at the good of our neighbour, and all inordinate motions and affections to anything that is his.

(Questions LXXIX, LXXX and LXXXI from the Westminster Shorter Catechism.)