Westminster Shorter Catechism

Q58

What is required in the fourth commandment?

The fourth commandment requireth the keeping holy to God such set times as he hath appointed in his Word; expressly one whole day in seven, to be a holy sabbath to himself142.
Duty
Ch. XXI Of Religious Worship, and the Sabbath Day

Scripture Proofs

142
Exodus 31:13Exodus 31:16-17