I will address you as Daily Bread if you deny being Nuff Sed.
Scriptures don't enjoin nobody to observe days,months,feasts nor years any more than they enjoin you to avoid people during some days in a month over menses
Unless you mean the scriptures is the apocrypha or Eusebius, the verses below are from the scriptures. They do command Sabbath observance on the seventh day of the week.
Exodus 16:23 And he said unto them, This is that which the Lord hath said, To morrow is the rest of the holy sabbath unto the Lord: bake that which ye will bake to day, and seethe that ye will seethe; and that which remaineth over lay up for you to be kept until the morning.
Exodus 16:29 See, for that the Lord hath given you the sabbath, therefore he giveth you on the sixth day the bread of two days; abide ye every man in his place, let no man go out of his place on the seventh day.
(NB: This comes before the giving of the Commandments in Sinai)
Exodus 20:8-11
Remember the sabbath day, to keep it holy. Six days shalt thou labour, and do all thy work: But the seventh day is the sabbath of the Lord thy God: in it thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that is within thy gates:
Exodus 31:15 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.
Leviticus 23:3 Six days shall work be done: but the seventh day is the sabbath of rest, an holy convocation; ye shall do no work therein: it is the sabbath of the Lord in all your dwellings.
Deuteronomy 5:12 Keep the sabbath day to sanctify it, as the Lord thy God hath commanded thee.
Deuteronomy 5:14 But the seventh day is the sabbath of the Lord thy God: in it thou shalt not do any work, thou, nor thy son, nor thy daughter, nor thy manservant, nor thy maidservant, nor thine ox, nor thine ass, nor any of thy cattle, nor thy stranger that is within thy gates; that thy manservant and thy maidservant may rest as well as thou.
Deuteronomy 5:15 And remember that thou wast a servant in the land of Egypt, and that the Lord thy God brought thee out thence through a mighty hand and by a stretched out arm: therefore the Lord thy God commanded thee to keep the sabbath day.
Nehemiah 10:31 And if the people of the land bring ware or any victuals on the sabbath day to sell, that we would not buy it of them on the sabbath, or on the holy day: and that we would leave the seventh year, and the exaction of every debt.
Isaiah 58:13 If thou turn away thy foot from the sabbath, from doing thy pleasure on my holy day; and call the sabbath a delight, the holy of the Lord, honourable; and shalt honour him, not doing thine own ways, nor finding thine own pleasure, nor speaking thine own words:
Jeremiah 17:22 Neither carry forth a burden out of your houses on the sabbath day, neither do ye any work, but hallow ye the sabbath day, as I commanded your fathers.
Matthew 12:12 How much then is a man better than a sheep? Wherefore it is lawful to do well on the sabbath days.
Mark 1:21 And they went into Capernaum; and straightway on the sabbath day he entered into the synagogue, and taught.
Mark 6:2 And when the sabbath day was come, he began to teach in the synagogue: and many hearing him were astonished, saying, From whence hath this man these things? and what wisdom is this which is given unto him, that even such mighty works are wrought by his hands?
Luke 4:16 And he came to Nazareth, where he had been brought up: and, as his custom was, he went into the synagogue on the sabbath day, and stood up for to read.
Luke 4:31 And came down to Capernaum, a city of Galilee, and taught them on the sabbath days.
Luke 13:16 And ought not this woman, being a daughter of Abraham, whom Satan hath bound, lo, these eighteen years, be loosed from this bond on the sabbath day?
Luke 23:56 And they returned, and prepared spices and ointments; and rested the sabbath day according to the commandment.
John 7:23 If a man on the sabbath day receive circumcision, that the law of Moses should not be broken; are ye angry at me, because I have made a man every whit whole on the sabbath day?
John 9:14 And it was the sabbath day when Jesus made the clay, and opened his eyes.
John 9:16 Therefore said some of the Pharisees, This man is not of God, because he keepeth not the sabbath day. Others said, How can a man that is a sinner do such miracles? And there was a division among them.
(At this accusation, if indeed the Sabbath had changed or was to be changed by his death and resurrection, Jesus should have defended his actions by so stating that the Commandment no longer stood. But he didn't).And now,
Apostolic practiceActs 13:14 But when they departed from Perga, they came to Antioch in Pisidia, and went into the synagogue on the sabbath day, and sat down.
Acts 13:27 For they that dwell at Jerusalem, and their rulers, because they knew him not, nor yet the voices of the prophets which are read every sabbath day, they have fulfilled them in condemning him.
Acts 13:44 And the next sabbath day came almost the whole city together to hear the word of God.
Acts 15:21 For Moses of old time hath in every city them that preach him, being read in the synagogues every sabbath day.
Acts 17:2 And Paul, as his manner was, went in unto them, and three sabbath days reasoned with them out of the scriptures,
The question is, other than following Rome's tradition, on what basis does protestantism keep Sunday as a Sabbath day?