Moroni 4:3 and D&C 20:77 — Sacramental Prayer on the Bread

A. O God, the Eternal Father, we ask thee
B. in the name of thy Son, Jesus Christ,

C. to bless and sanctify this bread to the souls of all those who partake of it,
D. that they may eat in remembrance of the body of thy Son,

    E. and witness unto thee,
     F. O God, the Eternal Father,
    E’. that they are willing to take upon them
     F’. the name of thy son,

D’. and always remember him
C’. and keep his commandments which he has given them,

B’. that they may always have his Spirit to be with them.
A’. Amen.

Amen can be a parallel match to God the Eternal Father as the Hebrew definition for Amen is Truth, Certainty

See at far bottom for how partaking of the bread and wine is a match to keeping the commandments.

Moroni 5:2 and D&C 20:79 — Sacramental Prayer on the Wine

A. O God, the Eternal Father, we ask thee
B. in the name of thy Son, Jesus Christ,

  C. to bless and sanctify this wine  to the souls of all those who drink of it,
   D. that they may do it in remembrance of the blood of thy Son,
       which was shed for them;

    E. that they may witness unto thee,
     F. O God, the Eternal Father,
    E’. [Ellipsis]
     F’. [Ellipsis]

D’. that they do always remember him,
C’. [Ellipsis]

B’. that they may have his Spirit to be with them.
A’. Amen.

Amen can be a parallel match to God the Eternal Father as the Hebrew definition for Amen is Truth, Certainty

See at far bottom for how partaking of the bread and wine is a match to keeping the commandments.

Side-by-side Comparison

Sacramental Prayer on the Bread	Sacramental Prayer on the Wine
a. O God, the Eternal Father, we ask thee	a. O God, the Eternal Father, we ask thee
b. in the name of thy Son, Jesus Christ,	b. in the name of thy Son, Jesus Christ,
c. to bless and sanctify this bread to the souls of all those who partake of it,	c. to bless and sanctify this wine to the souls of all those who drink of it,
d. that they may eat in remembrance of the body of thy Son,	d. that they may do it in remembrance of the blood of thy Son, which was shed for them;
e. and witness unto thee,	e. that they may witness unto thee,
f. O God, the Eternal Father,	f. O God, the Eternal Father,
e. that they are willing to take upon them	e. [Ellipsis]
f. the name of thy son,	f. [Ellipsis]
d. and always remember him	d. that they do always remember him,
c. and keep his commandments which he has given them,	c. [Ellipsis]
b. that they may always have his Spirit to be with them.	b. that they may have his Spirit to be with them.
a. Amen.	a. Amen.

Line-by-line comparison

Bread [B]
Water [W]

a. B: O God, the Eternal Father, we ask thee
W: O God, the Eternal Father, we ask thee

b. B: in the name of thy Son, Jesus Christ,
W: in the name of thy Son, Jesus Christ,

c. B: to bless and sanctify this bread to the souls of all those who partake of it,
W: to bless and sanctify this wine to the souls of all those who drink of it,

d. B: that they may eat in remembrance of the body of thy Son,
W: that they may do it in remembrance of the blood of thy Son, which was shed for them;

e. B: and witness unto thee,
W: that they may witness unto thee,

f. B: O God, the Eternal Father,
W: O God, the Eternal Father,

e’. B: that they are willing to take upon them
W: [Ellipsis]

f’. B: the name of thy son,
W: [Ellipsis]

d’. B: and always remember him
W: that they do always remember him,

c’. B: and keep his commandments which he has given them,
W: [Ellipsis]

b’. B: that they may always have his Spirit to be with them.
W: that they may have his Spirit to be with them.

a’. B: Amen.
W: Amen.

Partaking of the bread and wine is a match to keeping the commandments because this is what Christ commanded to be done in his remembrance.

Matt 26:26 And as they were eating, Jesus took bread, and blessed it, and brake it, and gave it to the disciples, and said, Take, eat; this is my body.

27 And he took the cup, and gave thanks, and gave it to them, saying, Drink ye all of it;

28 For this is my blood of the new testament, which is shed for many for the remission of sins.

Mark 14:22 And as they did eat, Jesus took bread, and blessed, and brake it, and gave to them, and said, Take, eat: this is my body.

23 And he took the cup, and when he had given thanks, he gave it to them: and they all drank of it.

24 And he said unto them, This is my blood of the new testament, which is shed for many.

Luke 22:19 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.

20 Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.

3 Nephi 18:1 And it came to pass that Jesus commanded his disciples that they should bring forth some bread and wine unto him.

2 And while they were gone for bread and wine, he commanded the multitude that they should sit themselves down upon the earth.

3 And when the disciples had come with bread and wine, he took of the bread and brake and blessed it; and he gave unto the disciples

and commanded that they should eat.

4 And when they had eaten and were filled,

he commanded that they should give unto the multitude.

5 And when the multitude had eaten and were filled,

he said unto the disciples: Behold there shall one be ordained among you, and to him will I give power that he shall break bread and bless it and give it unto the people of my church, unto all those who shall believe and be baptized in my name.

6 And this shall ye always observe to do, even as I have done, even as I have broken bread and blessed it and given it unto you.

7 And this shall ye do in remembrance of my body,

which I have shown unto you.

And it shall be a testimony unto the Father that ye do always remember me.

And if ye do always remember me ye shall have my Spirit to be with you.

8 And it came to pass that when he said these words,

he commanded

his disciples that they should take of the wine of the cup and drink of it,

and that they should also give unto the multitude that they might drink of it.

9 And it came to pass that they did so, and did drink of it and were filled;

and they gave unto the multitude,

and they did drink, and they were filled.

10 And when the disciples had done this, Jesus said unto them: Blessed are ye for this thing which ye have done, for this is fulfilling my commandments, and this doth witness unto the Father that ye are willing to do that which I have commanded you.

11 And this shall ye always do to those who repent and are baptized in my name;

and ye shall do it in remembrance of my blood,

which I have shed for you,

that ye may witness unto the Father that ye do always remember me.