Communion, the Lord's Supper:
#1 -- As they were eating the passover meal:
#2 -- Jesus used the bread as a remembrance of his body, his death:
#3 -- Jesus used the cup as a remembrance of his blood, to be shed for many for the remission of sins:
#4 -- Time of the Reformation by Jesus:
#5 -- Examine yourselves, whether you are in the faith, prove yourselves:
#6 -- Jesus was looking forward to that day when he would eat and drink with them in the kingdom of God

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#1 -- As they were eating the passover meal:
-- as they were eating --- Matthew 26:26; Mark 14:22;
-- as they sat down, Jesus said, I have desired to eat this passover with you before I suffer --- Luke 22:15
-- Jesus said, I will not any more eat thereof, until it be fulfilled in the kingdom of God --- Luke 22:16

#2 -- Jesus used the bread as a remembrance of his body, his death:
-- Jesus took bread, blessed it, broke it, and gave it to the disciples --- Matthew 26:26; Mark 14:22
-- Jesus said, take, eat, this is my body (represented by the bread) --- Matthew 26:26; Mark 14:22
-- Jesus took bread, and gave thanks, and brake it, and gave unto them, saying, This is my body (represented by the bread) which is given for you: this do in remembrance of me --- Luke 22:19
-- I will not any more eat thereof, until it be fulfilled in the kingdom of God

#3 -- Jesus used the cup as representing his blood, to be shed for many for the remission of sins:
-- Jesus took the cup, gave thanks, and gave it to them saying, all of you drink of it --- Matthew 26:27; Mark 14:23; Luke 22:17
-- this is my blood (represented by the cup) of the new testament which is shed for many for the remission of sins --- Matthew 26:28
-- this is my blood (represented by the cup) of the new testament which is shed for many --- Mark 14:24
-- Likewise also the cup after supper, saying, This cup is the new testament in my blood (represented by the cup), which is shed for you --- Luke 22:20
-- Jesus is the Lamb of God which takes away the sin of the world --- John 1:29
-- sin is the transgression of the law, 1 John 3:4 therefore to do good, right, is to keep the law.

#4 -- Time of Reformation by Jesus:
-- Know that you are in the faith, prove your selves, for there are only two options, either you have accepted Christ or have refused to accept him. As Jesus told the Rich Young Ruler, you may inherit eternal life if you keep the commandments, all ten, lack not one --- Matthew 19:17-22
-- Gifts and sacrifices were offered but could not make him perfect, as pertaining to the conscience --- Hebrews 9:9
-- foods, drinks, washings, and ordinances, ceased with the time of reformation by Jesus --- Hebrews 9:10
-- what manner of love the Father hath bestowed upon us, that we should be called the sons of God --- 1 John 3:1
-- every man that hath this hope in him purifieth himself, even as he is pure --- 1 John 3:3
-- he was manifested to take away our sins; and in him is no sin --- 1 John 3:5

#5 -- Examine yourselves, whether you are in the faith, prove yourselves:
-- Know that you are in the faith, prove yourselves, for there are only two options, either you have accepted Christ or have refused to accept him. As Jesus told the Rich Young Ruler, you may inherit eternal life if you keep the commandments, all ten, lack not one --- Matthew 19:17-22
-- Let a man Examine Himself, and so let him eat of that bread, and drink of that cup --- 1 Corinthians 11:28-29
-- Be doers of the word, and not hearers only, deceiving yourselves --- James 1:22
-- Examine Yourselves, whether you be in the faith, prove your own selves --- 2 Corinthians 13:5
-- Jesus is the Lamb of God which takes away the sin of the world --- John 1:29
-- sin is the transgression of the law, therefore to do good is to keep the law.

#6 -- Jesus was looking forward to that day when he would eat and drink with them in the kingdom of God
-- Jesus said, I will not drink again of this fruit of the vine, until that day when I drink it new with you in my Father's kingdom --- Matthew 26:29; Mark 14:25; Luke 22:15-20

Jesus is our passover:
1 Corinthians 5:7 KJV
[7] Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us:

While we were yet sinners Christ died for us:
Romans 5:8 KJV
[8] But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.

Remembrance of Jesus:
Luke 22:19 KJV
[19] 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.

1 Corinthians 11:24 KJV
[24] 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.

1 Corinthians 11:25 KJV
[25] 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.

Jesus is the bread of life
John 6:33 KJV
[33] For the bread of God is he which cometh down from heaven, and giveth life unto the world.

John 6:35 KJV
[35] And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst.

John 6:48 KJV
[48] I am that bread of life.

John 6:51 KJV
[51] I am the living bread which came down from heaven: if any man eat of this bread, he shall live for ever: and the bread that I will give is my flesh, which I will give for the life of the world.

1 Corinthians 11:23-24 KJV
[23] 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: [24] 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.

1 Corinthians 11:26 KJV
[26] For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.

Examine Another or Yourself:
1 Corinthians 5:9-13 KJV
[9] I wrote unto you in an epistle not to company with fornicators: [10] Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world. [11] But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat. [12] For what have I to do to judge them also that are without? do not ye judge them that are within? [13] But them that are without God judgeth. Therefore put away from among yourselves that wicked person.

1 Corinthians 11:27-32 KJV
[27] 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. [28] But let a man examine himself, and so let him eat of that bread, and drink of that cup. [29] For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body. [30] For this cause many are weak and sickly among you, and many sleep. [31] For if we would judge ourselves, we should not be judged. [32] But when we are judged, we are chastened of the Lord, that we should not be condemned with the world.

2 Corinthians 13:5-6 KJV
[5] Examine yourselves, whether ye be in the faith; prove your own selves. Know ye not your own selves, how that Jesus Christ is in you, except ye be reprobates? [6] But I trust that ye shall know that we are not reprobates. (reprobate: to condemn strongly as unworthy, unacceptable, or evil; to refuse to accept: reject)