Sacrament
Blessing the bread, including the words of the blessing.
Blessing of the wine, including the words of the blessing.
It should be noted that as water is typically used currently, that the word "wine" should be substituted with "water" when pronouncing the blessing.
In the ordinance of the sacrament it does not matter particularly what is eaten or drunk.
- Elder Russel M. Nelson, "Worshipping at Sacrament Meeting", Ensign, Aug. 2004
under heading "Conducting Sacrament Meeting":
"[non-members are] not expected to take the sacrament. However, it is not forbidden."
Mentions children taking the Sacrament as well.
- Pres. Joseph Fielding Smith, "Doctrines of Salvation", 2:343
On what it means to partake of the sacrament unworthily.
"For whoso eateth and drinketh my flesh and blood bunworthily eateth and drinketh damnation to his soul; therefore if ye know that a man is unworthy to eat and drink of my flesh and blood ye shall forbid him."
"see that ye partake not of the sacrament of Christ unworthily"
Native Hebrew term for wine is "blood of the grape".
The hebrew word for bread originally meant "flesh".
Other historical notes on this symbolism and the sacrament ordinance.
- Tad R. Callister, "The Inevitable Apostasy", pp. 242-245
Discusses how the ordinance of the sacrament changed during the apostasy.
"I’m puzzled by the instructions in D&C 20:76 that the priests should 'kneel with the church' in blessing the sacrament. What does this mean, and has it ever been the practice for the whole congregation to kneel?"
- Joseph Smith, compiled by Joseph Fielding Smith, "Teachings of the Prophet Joseph Smith", p. 21
The teaching of a specific false doctrine was made a bar to communion by a Bishop, which decision was sanctioned by the first presidency.