2ND COMING

And it shall be said in that day, Lo, this is our God; we have waited for Him, and He will save us...Isaiah 25:9

For, behold, the day comes, that shall burn as an oven; and all the proud, yea, and all that do wickedly, shall be stubble: and the day that comes shall burn them up... for they shall be ashes under the soles of your feet. Mal 4:1

For there shall arise false Christs, and false prophets, and shall show great signs and wonders; .. For as the lightning comes out of the east, and shines even unto to the west; so shall also the coming of the Son of man be..Watch therefore: for you know not what hour your Lord does come.  Matthew 24:23-27,42
 (People will be deceived by those who proclaim to be Christ, and Satan himself will try to deceive many. See II Thess. 2:9)

SABBATH

And God BLESSED the SEVENTH DAY, and SANCTIFIED IT... Genesis 2:1-3
(The Sabbath was instituted at Creation and was made sacred by God)

REMEMBER the Sabbath day, to KEEP IT holy. Exodus 20:8-11
(The 4th Commandment points to God's created day, making it impossible to change)

Six days you shall gather it (manna); but on the Seventh Day which is the Sabbath, in it there shall be none.
Ex 16:25-28 (The Sabbath was kept by God's people before the law was given on Mt.Sinai, showing it pre-existed before the law)

And the Lord delivered unto me two tables of stone written with the finger of GOD...  Deuteronomy 9:10

My covenant will I not break, not alter the thing that is gone out of my lips. Psalm 89:34
(God will not alter or change His law)