“Remember the Sabbath day, to keep it holy” (Exod 20:8 ESV). The word “Remember” implies that it is well known and recognized” JFB Commentary (ref#17, [Exod 20:8-11]).

“…our Lord and the writers of the New Testament treated the Ten Commandments as the embodiment…of the fundamental elements of essential morality, authoritative for all time and valid in all the circumstances of life” Benjamin B. Warfield (ref#180).

“…these Ten Commandments…was delivered…and accompanied by thunder, lightning, and an earthquake. It was the only part written on tables of stone by God Himself.”…“I there read one whole commandment out of ten devoted to the Sabbath Day, and that the longest, fullest, and most detailed of all (Exod 20:8-11)” Bishop J. C. Ryle (ref#167).

The Old Testament Prophets recorded the importance of this command. They spoke of breaking the Sabbath as “the most heinous transgressions of the moral law (Ezek 20:13,16,24; 22:8,26)” Bishop J. C. Ryle (ref#167) and “one of the great sins which brought judgments on Israel…(Neh 13:18; Jer 17:19-27)” Bishop J. C. Ryle (ref#167).

“Christ…kept the Sabbath religiously and taught His disciples…to keep it in its essential spiritual sense as ordained by God” Archibald A. Hodge (ref#181).

“I find Him speaking eleven times on the subject of the Sabbath, but it is always to correct the superstitious additions which the Pharisees had made…about observing it and never to deny the holiness of the day” Bishop J. C. Ryle (ref#167).

Also, the Apostles kept one day a week as a Sabbath (Acts 20:7; 1 Cor 16:2). They called it the LORD’s Day (Rev 1:10).

Even as Scripture defines yet unfulfilled prophecy the Fourth Commandment is mentioned: “’And it shall be from new moon to new moon And from sabbath to sabbath, All mankind will come to bow down before Me,’ says the LORD” (Isa 66:23 NASB).

How important is it? Bishop J. C. Ryle says, “…the Ten Commandments…is just as important to expound and enforce…as to preach Christ crucified” (ref#167).