This Is My Body

"This is My body" occurs several times in the Bible, but was said at only one incident: the last supper.

this is my body

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.
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. 1 Corinthians 11:24
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.

This Is My Blood

Matthew 26:28
For this is my blood of the new testament, which is shed for many for the remission of sins. Mark 14:24
And he said unto them, This is my blood of the new testament, which is shed for many. Luke 22:20
Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you. 1 Corinthians 11:25
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.

Covenants

In Jewish culture, when an blood-brother oath was made men would cut their wrists and let the blood mingle. The would exchange armor, shields, weapons, coats, and even parts of their name. (Note this is prevailant when God made a covenant and gave part of the sound in His name to Abram calling him Abraham. [GEN 17:3-5; 1 CHR 1:27; NEH 9:7]) The final part of the ceremony would be to break off a piece of bread, trade pieces, and eat it.