There is no commandment of God to Christians to keep either Sabbath or Sunday.
If there were, you would quote it already. But so far you found it only in the Old Covenant given to ancient Israel.
Matthew 5: Not to destroy.
17 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.
18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
19 Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.
20 For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.
Notes:
- What's the opposite of destroy? Antonyms of destroy: build, reconstruct, preserve, restore, raise
- Not one jot or tittle pretty much negates any change in the law whatsoever.
- Keep the commandments and teach others to keep them.
- Nowhere do we see Jesus negating any commandment of the Ten. Instead, we see the law upheld.
Matthew 12: Sabbath observance vs tradition.
1 At that time Jesus went on the sabbath day through the corn; and his disciples were an hungred, and began to pluck the ears of corn and to eat.
2 But when the Pharisees saw it, they said unto him, Behold, thy disciples do that which is not lawful to do upon the sabbath day.
3 But he said unto them, Have ye not read what David did, when he was an hungred, and they that were with him;
4 How he entered into the house of God, and did eat the shewbread, which was not lawful for him to eat, neither for them which were with him, but only for the priests?
5 Or have ye not read in the law, how that on the sabbath days the priests in the temple profane the sabbath, and are blameless?
6 But I say unto you, That in this place is one greater than the temple.
7 But if ye had known what this meaneth, I will have mercy, and not sacrifice, ye would not have condemned the guiltless.
8 For the Son of man is Lord even of the sabbath day.
Notes:
- Jesus makes it a point to call Himself Lord of the Sabbath day.
- If Jesus is Lord of the Sabbath, then He has utmost authority concerning the Sabbath.
- Nowhere do we see Jesus negating any commandment of the Ten. Instead, we see the law upheld.
Matthew 15: Commandment observance vs tradition.
3 But he answered and said unto them, Why do ye also transgress the commandment of God by your tradition?
Notes:
- Transgression of the commandment of God = commandments are still binding.
- This is an important lesson for those who would put tradition over the word of God.
- Sunday is not commanded anywhere in scripture, thus it is a tradition of men.
- Why do ye also transgress the commandment of God by your tradition?
- Nowhere do we see Jesus negating any commandment of the Ten. Instead, we see the law upheld.
Matthew 19: Commandment keeping and love combined.
16 And, behold, one came and said unto him, Good Master, what good thing shall I do, that I may have eternal life?
17 And he said unto him, Why callest thou me good? there is none good but one, that is, God: but if thou wilt enter into life, keep the commandments.
18 He saith unto him, Which? Jesus said, Thou shalt do no murder, Thou shalt not commit adultery, Thou shalt not steal, Thou shalt not bear false witness,
19 Honour thy father and thy mother: and, Thou shalt love thy neighbour as thyself.
20 The young man saith unto him, All these things have I kept from my youth up: what lack I yet?
Notes:
- Jesus said keep the commandments, an all encompassing statement. He is referring to the Ten Commandments, as we see in the next verse when He quotes the Ten Commandments.
- Jesus only quoting four of the Ten does not negate the other six, especially considering the fact that Jesus observed the Sabbath in life and death, and taught commandment observance.
- Jesus is quoting the Old Testament. Exodus 20 (Ten Commandments), Leviticus 19:18 (love your neighbor). These were not new concepts.
- Nowhere do we see Jesus negating any commandment of the Ten. Instead, we see the law upheld.
Matthew 22: All the law and the prophets hang on love.
On these two commandments hang all the law and the prophets.
Notes:
- All the law and the prophets hang on love.
- Nowhere do we see Jesus negating any commandment of the Ten. Instead, we see the law upheld.
Revelation 22: Commandment keeping upheld.
14 Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.
15 For without are dogs, and sorcerers, and whoremongers, and murderers, and idolaters, and whosoever loveth and maketh a lie.
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15 (Amplified) Outside are the dogs [the godless, the impure, those of low moral character] and the sorcerers [with their intoxicating drugs, and magic arts], and the immoral persons [the perverted, the molesters, and the adulterers], and the murderers, and the idolaters, and everyone who loves and practices lying (deception, cheating).
Notes:
- Do his commandments.
- Conditional to the tree of life and entering the city.
- Outside the city are sinners who break the Ten Commandments (murder, idolatry, bearing false witness) and practice abominations to God.
- Nowhere do we see Jesus negating any commandment of the Ten. Instead, we see the law upheld.
Conclusion
Keep the commandments of God, as Jesus taught throughout His ministry
and from heaven. The Ten Commandments, of which includes the Sabbath commandment—the one that says
remember and to keep holy.