Exodus 31:13 (NKJV) "Speak also to the children of Israel, saying: `Surely My Sabbaths you shall keep, for it [is] a sign between Me and you throughout your generations, that [you] may know that I [am] Yahuah who sanctifies you.
The Sabbath is a sign between Yahuah and His people forever. And not just Israel, but for all who enjoin themselves unto the blessings and promises of Israel by accepting Yahusha the Messiah.
Isai 56:3 (NKJV) Do not let the son of the foreigner Who has joined himself to Yahuah Speak, saying, "Yahuah has utterly separated me from His people"; Nor let the eunuch say, "Here I am, a dry tree." 4 For thus says Yahuah: "To the eunuchs who keep My Sabbaths, And choose what pleases Me, And hold fast My covenant, 5 Even to them I will give in My house And within My walls a place and a name Better than that of sons and daughters; I will give them an everlasting name That shall not be cut off. 6 "Also the sons of the foreigner Who join themselves to Yahuah, to serve Him, And to love the name of Yahuah, to be His servants--Everyone who keeps from defiling the Sabbath, And holds fast My covenant--
We know that not just Israel was to keep the Sabbath, but EVERYONE.
The Sabbath will also be kept when Yahusha returns:
Isai 66:22 (NKJV) "For as the new heavens and the new earth Which I will make shall remain before Me," says Yahuah, "So shall your descendants and your name remain. 23 And it shall come to pass [That] from one New Moon to another, And from one Sabbath to another, All flesh shall come to worship before Me," says Yahuah.
Many Christians, when asked if they believe in keeping the Ten Commandments, answer with a resounding "Yes!". Many will even have (often excerpts) of the Ten Commandments hanging on their walls in prominent places in house. All too often however, those ten commandments that they believe so much in keeping will stand there as a witness against them all the days of their life. Here is the fourth Commandment:
Exod 20:9 (NKJV) Six days you shall labor and do all your work, 10 but the seventh day [is] the Sabbath of Yahuah your Father [In] [it] you shall do no work: you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who [is] within your gates. 11 For [in] six days Yahuah made the heavens and the earth, the sea, and all that [is] in them, and rested the seventh day. Therefore Yahuah blessed the Sabbath day and hallowed it.
All throughout history man has profaned the day Yahuah sanctified for rest. It was true even in the days when Isaiah was a prophet of Israel. Yahuah told him to stand in the gates of Jerusalem and instruct the rulers and people in Sabbath keeping, and rebuke them for their Sabbath desecration. (Isaiah 56:2-6, 58:13, 66:23)
150 years later the prophet Nehemiah asked the people:
Nehe 13:17 (NKJV) Then I contended with the nobles of Judah, and said to them, "What evil thing [is] this that you do, by which you profane the Sabbath day? 18 "Did not your fathers do thus, and did not Yahuah bring all this disaster on us and on this city? Yet you bring added wrath on Israel by profaining the Sabbath."
He then put forth measures for proper Sabbath keeping
Today is no exception. Keeping the Sabbath is indeed not a popular thing. We find large numbers of people reserving the Sabbath for worldly things rather than for holy things. Many start out to work on Sabbath morning. Many others spend the day doing their dirtiest cleaning chores, attending sports activities, buying, selling and just overall ignoring the Sabbath commandment. In the last 50 years, even keeping the sabbath on a fixed day as (Saturday)or(Sunday) is ignored by those who believe in keeping it. Especially on days that it is inconvenient for them. The month is reckoned by the moon as the high days are reckoned by the moon.
Remember to keep the Shabbat Kodesh! (Holy Rest)