Keep the sabbath day to sanctify it,.... Or observe it, by setting it apart as a time of natural rest, and for the performance of holy and religious exercises; see Exodus 20:8, where the phrase is a little varied, "remember the sabbath day to keep it holy"; it having been instituted before:
as the Lord thy God hath commanded thee; not at Sinai only, for the same might then have been observed of all the rest of the commands, but before the giving of the law, at the first of the manna; see Exodus 16:23.

Keep the sabbath day to sanctify it, as the Lord thy God hath commanded thee--that is, keep it in mind as a sacred institution of former enactment and perpetual obligation. [See on Exodus 20:8].

Keep the sabbath - day, to sanctify it - Dost thou do no work on this day, which can be done as well on another? Art thou peculiarly careful on this day, to avoid all conversation, which does not tend to the knowledge and love of God? Dost thou watch narrowly over all that are within thy gates, that they too may keep it holy? And dost thou try every possible means, to bring all men, wherever you are, to do the same?