The Sabbath is included in the Ten not because it is an eternal moral principle but because it is the covenant sign of the Mosaic administration (Exod 31:13–17), the badge marking Israel’s national relationship to YHWH; that is why God placed it in the Decalogue — not because its calendar form is universal, but because the Ten Words function as the covenant preamble.
Leviticus 23 explicitly groups the weekly Sabbath with the festival Sabbaths, using the same vocabulary (“holy convocation,” “no work,” “it is a sabbath”), proving the weekly day is part of the ceremonial system.
Exo 31:13-17
13 Speak thou also unto the children of Israel, saying, Verily my sabbaths ye shall keep: for it is a sign between me and you throughout your generations; that ye may know that I am the LORD that doth sanctify you. 14 Ye shall keep the sabbath therefore; for it is holy unto you: every one that defileth it shall surely be put to death: for whosoever doeth any work therein, that soul shall be cut off from among his people. 15 Six days may work be done; but in the seventh is the sabbath of rest, holy to the LORD: whosoever doeth any work in the sabbath day, he shall surely be put to death. 16 Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant. 17 It is a sign between me and the children of Israel for ever: for in six days the LORD made heaven and earth, and on the seventh day he rested, and was refreshed.
This is clearly the expansion of the law.
Like murder and Adultery Moses was given extra information about the moral laws, how to judge people, etc...
This does not make it a shadow law.
Yes it was specifically for the children of Israel. But this is because they were HIS choosen people.
As God's choosen people today the same principle applies..
1. The sabbath is a sign between God and His people.
2. that His people may know that the LORD that doth sanctify them.
3. Wherefore the children of Israel, God people today shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant.
4. It is a sign between me and the Gods children for ever:
5. for in six days the LORD made heaven and earth, and on the seventh day he rested, and was refreshed.
Who is the Israel of God today with this perpetual covenant?
Gal 6:15-16
15 For in Christ Jesus neither circumcision availeth any thing, nor uncircumcision, but a new creature. 16 And as many as walk according to this rule, peace be on them, and mercy, and upon the Israel of God.
"For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh: But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God." Romans 2:28-29.
When did the Sabbath stop being a sign for the people of God.