Isn’t the Sabbath for the Jews only, and didn’t God introduce the Sabbath to the Jews for the first time in Exodus 16?
It is not correct that the Sabbath is mentioned for the first time in Exodus 16, or that God introduced the Sabbath to the people at that time. The Sabbath is mentioned in the very second chapter of the Bible, where God set it aside as HOLY, to be USED by man for a HOLY purpose.
God created the Sabbath at the time when He created man. We read in Genesis 2:2, “He RESTED on the seventh day from all His work…Then God blessed the seventh day and sanctified it, because in it He rested from all His work.” The word for “rested,” in the Hebrew, is “shabath,” and it means, according to Young’s Analytical Concordance to the Bible, “to cease, rest, keep Sabbath.” God created the Sabbath at the time of the creation of man, by RESTING or ceasing from His work, and He “sanctified” that day, that is, He “set it aside for a holy purpose.”
Later, we read, in Exodus 20:11 that God had “rested on the seventh day. Therefore the LORD blessed the SABBATH day…