1 Corinthians 11:27
Therefore whoever shall eat this bread and drink this cup of the Lord unworthily shall be guilty of the body and blood of the Lord.
John 6:51
I AM the living bread which came down from heaven; if anyone eats of this bread, they shall live for ever; and the bread that I will give is my flesh, which I will give for the life of the world.
Numbers 9:10
Speak unto the sons of Israel, saying, If any man of you or of your generations should be unclean by reason of a dead body or be on a journey afar off, yet he shall keep the passover unto the LORD.
Numbers 9:13
But the man that is clean and is not on a journey and forbears to keep the passover, that same soul shall be cut off from among his people; because he did not bring the offering of the LORD in his appointed season; that man shall bear his sin.
Leviticus 10:1-3
And Nadab and Abihu, the sons of Aaron, took each of them his censer and put fire therein and put incense thereon and offered strange fire before the LORD, which he had never commanded them.
2 Chronicles 30:18-20
For a multitude of the people, even many of Ephraim and Manasseh, Issachar, and Zebulun, had not cleansed themselves, and they ate the passover not as it was written. But Hezekiah prayed for them, saying, The good LORD pardon each one
Matthew 22:11
And when the king came in to see the guests, he saw there a man who did not have on a wedding garment,
John 6:63-64
The Spirit is he that gives life; the flesh profits nothing; the words that I have spoken unto you, they are Spirit and they are life.
John 13:18-27
I speak not of you all; I know whom I have chosen; but that the scripture may be fulfilled, He that eats bread with me has lifted up his heel against me,
1 Corinthians 10:21
Ye cannot drink the cup of the Lord and the cup of demons; ye cannot be participants of the Lord's table and of the table of demons.
Hebrews 10:29
Of how much greater punishment, suppose ye, shall he be thought worthy, who has trodden underfoot the Son of God and has counted the blood of the covenant, with which he was sanctified, an unholy thing and has done despite unto the Spirit of grace?