The Sign of Holiness
Genesis 2:1-3 KJV
 Thus the heavens and the earth were finished, and all the host of them.  And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made.  And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.
Exodus 20:8-11 KJV
 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:  For in six days the Lord made heaven and earth, the sea, and all that in them is , and rested the seventh day: wherefore the Lord blessed the sabbath day, and hallowed it.
Remembering the Death and Resurrection of Jesus our Christ
Luke 22:19-20 KJV
 And he took bread, and gave thanks, and brake it , and gave unto them, saying, This is my body which is given for you: this do in remembrance of me.  Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.
1 Corinthians 11:23-32 KJV
 For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread:  And when he had given thanks, he brake it , and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.  After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it , in remembrance of me.  For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.  Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord.  But let a man examine himself, and so let him eat of that bread, and drink of that cup.  For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.  For this cause many are weak and sickly among you, and many sleep.  For if we would judge ourselves, we should not be judged.  But when we are judged, we are chastened of the Lord, that we should not be condemned with the world.