1 Corinthians 11:27
So he that eats the bread or drinks the cup of the Lord unworthy must answer for a sin against the body and blood of the Lord.
John 6:51
"I myself am the living bread that has come down from heaven. Any one who eats this bread will live forever; and moreover, the bread which I will give is my flesh, given for the life of the world."
Matthew 22:11
"Then the king came in to inspect his guests, and he discovered there a man who had not put on a wedding-garment. He said to him,
John 6:63-64
"The spirit is what gives life; the flesh is of no avail. The words which I have been speaking to you, are spirit and are life.
John 13:18-27
I do not speak concerning all of you. I know whom I have chosen, but it is that the Scripture may be fulfilled, which says. "He who eats my bread has lifted up his heel against me.
1 Corinthians 10:21
You cannot drink the cup of the Lord and also the cup of demons; you cannot be partakers in the Lord's table and in the table of demons.
Hebrews 10:29
How much surer, think you, will be the punishment of one who has trodden under foot the Son of God, and has profaned that covenant blood with which he was sanctified, and has done despite to the spirit of grace?