Yea, she is obviously mistaken. Those who have their own spin are often reluctant to post text. The ugly thing is, how some people have allowed commentary to overshaddow God's word on this and other matters.
What text do they present that says, Sabbath was made before sin?
The bible does record that all seven day came before sin, but the seveth day of the week was not appointed as the sabbath until God gave it to the Children of Israel as a sign between Him and them.
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These consistent texts singles out 1 commandment as a sign. No matter what people repeat over and over,
the sabbath is not a sign for all mankind to keep, God said it is a sign between Himself and the Children of Israel.
Exd 31:13Speak 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.
Exd 31:14Ye 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.
Exd 31:15Six 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.
Exd 31:16Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, [for] a perpetual covenant.
Exd 31:17It [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.
Exd 31:18¶And he gave unto Moses, when he had made an end of communing with him upon mount Sinai, two tables of testimony, tables of stone, written with the finger of God.
Who should we believe?
What texts do they have to prove "a creation instituted sabbath?"
Why Is God saying something different than they're saying about His Sabbath?
Why is God saying something different than they are saying about His rest on the seventh day?
How and when do Christains become the Children of Israel?