Westminster Larger Catechism
Q. 119. What are the sins forbidden in the fourth commandment?
A. The sins forbidden in the fourth commandment are, all omissions of the duties required, all careless, negligent, and unprofitable performing of them, and being weary of them; all profaning the day by idleness, and doing that which is in itself sinful; and by all needless works, words, and thoughts, about our worldly employments and recreations.
Westminster Shorter Catechism
Q. 61. What is forbidden in the fourth commandment?
A. The fourth commandment forbiddeth the omission or careless performance of the duties required, and the profaning the day by idleness, or doing that which is in itself sinful, or by unnecessary thoughts, words or works, about our worldly employments or recreations.