This has already been covered before, and all that you are doing is intentionally conflating two different things. Here's from a source not affiliated with any denomination:
The Lord's Day in
Christianity is generally
Sunday, the principal day of communal
worship. It is observed by most Christians as the weekly memorial of the
resurrection of Jesus Christ, who is said in the
canonical Gospels to have been witnessed alive from the dead early on the first day of the week. The phrase appears in
Rev. 1:10...
Christians held corporate worship on Sunday in the 1st century. An early example of Christians meeting together on a Sunday for the purpose of "breaking bread" and preaching is cited in the New Testament book of Acts (
Acts 20:7). 2nd-century writers such as
Justin Martyr attest to the widespread practice of Sunday worship (
First Apology,
chapter 67), and by 361 AD it had become a mandated weekly occurrence...
Around 170 AD,
Dionysius, Bishop of Corinth, wrote to the
Roman Church, "Today we have kept the Lord's holy day (
kyriake hagia hemera), on which we have read your letter." In the latter half of the 2nd century, the apocryphal
Acts of Peter identify
Dies Domini (Latin for "Lord's Day") as "the next day after the Sabbath," i.e., Sunday. From the same period of time, the
Acts of Paul present St. Paul praying "on the Sabbath as the Lord's Day (
kyriake) drew near." However, the Lord's day is identified with the Sabbath in the
Acts of John as "on the seventh day, it being the Lord's day, he said to them: now it is time for me also to partake of food."... --
Lord's Day - Wikipedia
Also, what you ignore is the fact that Jesus gave the power of discernment and possible changes that could be made to his Apostles, and they in turn passed this on to their appointees.
Finally, your position is very hypocritical since the Shabbat observance with Jews only applies to Jews and is part of the 613 Commandments, all of which are found in Torah:
Judaism 101: A List of the 613 Mitzvot (Commandments) Thus, all you are doing is picking & choosing which Commandments that you and others in the SDA want to follow.
Actually no it has not been covered. The OP is asking for scripture and you have provided nothing except man made teachings and traditions from the Roman Catholic Church that break the commandments of God. If you have no scripture why for your tradition who are you following; God or man? JESUS says all those who knowingly follow man made teachings and traditions over the Word of God are not following God. Who do you believe God or man? I know who I believe.
Let's look at the evidence both biblically and historically...
Jesus kept and followed the Sabbath which was his custom and taught us how to truly keep the Sabbath holy according to God's 4th commandment *
Luke 4:16;
Matthew 12:1-12;
Mark 2:27-28. JESUS even warned his disciples in the future after his death and resurrection that they would still be keeping the Sabbath *
Matthew 24:20 before the destruction of Jerusalem. After the death and resurrection of JESUS the Apostles continued keeping the Sabbath according to God's LAW which was also the custom of Paul the Apostle *Acts 13:14; 13:27; 13:44; 15:21; 16:13; 17:2; 18:4
Now even after the death of JESUS and all the Apostles the disciples of JESUS have kept Gods 4th commandment unbroken to this very present day....
Sabbath Observance - The first Century A.D.
JOSEPHUS
"There is not any city of the Grecians, nor any of the Barbarians, nor any nation whatsoever, whither our custom of resting on the seventh day hath not come!" M'Clatchie, "Notes and Queries on China and Japan" (edited by Dennys), Vol 4, Nos 7, 8, p.100.
PHILO
Declares the seventh day to be a festival, not of this or of that city, but of the universe. M'Clatchie, "Notes and Queries," Vol. 4, 99
So we have incontrovertible proof that the observance of sunday was NOT practiced by the apostolic church of the first century. Although the poison of apostasy had already begun, it did not reach the ascendancy until the passage of a few more centuries.
The next installment will show the historical record of the early christians observing the true seventh day Sabbath in the second century A.D.
Sabbath Observance - The Second Century A.D.
EARLY CHRISTIANS - 2nd Century
"The primitive Christians had a great veneration for the Sabbath, and spent the day in devotion and sermons. And it is not to be doubted but they derived this practice from the Apostles themselves, as appears by several scriptures to the purpose." "Dialogues on the Lord's Day," p. 189. London: 1701, By Dr. T.H. Morer (A Church of England divine).
EARLY CHRISTIANS - 2nd Century
"...The Sabbath was a strong tie which united them with the life of the whole people, and in keeping the Sabbath holy they followed not only the example but also the command of Jesus." "Geschichte des Sonntags," pp.13, 14
EARLY CHRISTIANS - 2nd Century
"The Gentile Christians observed also the Sabbath," Gieseler's "Church History," Vol.1, ch. 2, par. 30, 93.
EARLY CHRISTIANS - 2nd Century
"The primitive Christians did keep the Sabbath of the Jews;...therefore the Christians, for a long time together, did keep their conventions upon the Sabbath, in which some portions of the law were read: and this continued till the time of the Laodicean council." "The Whole Works" of Jeremy Taylor, Vol. IX,p. 416 (R. Heber's Edition, Vol XII, p. 416).
EARLY CHRISTIANS - 2nd Century
"It is certain that the ancient Sabbath did remain and was observed (together with the celebration of the Lord's day) by the Christians of the East Church, above three hundred years after our Saviour's death." "A Learned Treatise of the Sabbath," p. 77
Note: By the "Lord's day" here the writer means Sunday and not the true Sabbath," which the Bible says is the Sabbath. This quotation shows Sunday coming into use in the early centuries soon after the death of the Apostles. It illustrates the apostasy that Paul the Apostle foretold of when he spoke about a great "falling away" from the Truth that would take place soon after his death.
"From the apostles' time until the council of Laodicea, which was about the year 364, the holy observance of the Jews' Sabbath continued, as may be proved out of many authors: yea, notwithstanding the decree of the council against it." "Sunday a Sabbath." John Ley, p.163. London: 1640.
You know already my friend that I have historical references showing God has had a people all through time to this present day that have kept God's 4th commandment Sabbath unbroken as I have shared these with you in another thread and happy to re-post them here. Your response was to simply ignore them.
Seems like there are two groups forming. Those who believe and follow God's Word and those who follow man made teachings and traditions that break the commandments of God. Who's side will you be on?
God's Sheep hear His Voice (the Word of God) and follow him. Those who do not are not God's Sheep.