1 Corinthians 11:29 defines unworthy partaking as failing to discern the body, directly explaining the guilt mentioned in verse 27.

1 Corinthians 11:24 records Jesus' institution of the supper, defining the bread as his body—essential for understanding what it means to partake worthily.

1 Corinthians 11:25 records Jesus instituting the cup as the new covenant in his blood — the very body and blood this verse warns against profaning.

1 Corinthians 10:21 contrasts the Lord's cup with demons' cup – a similar warning against profaning the sacrament by mixing with idolatry.

In John 13:18-27, Judas eats bread with Jesus yet betrays him, providing a vivid example of unworthy participation that Paul warns against.

Malachi 1:7 condemns offering defiled food and treating the Lord's table as contemptible, directly paralleling the warning against unworthy communion.

Hebrews 10:29 warns against trampling the Son and profaning the blood of the covenant — exactly the guilt this verse describes.

Leviticus 10:1-3 shows Nadab and Abihu struck down for unauthorized fire – a precedent for the seriousness of profaning holy things.

2 Chronicles 30:18-20 shows God merciful toward those who ate Passover uncleansed – contrasting with Paul's warning of guilt.

Numbers 9:13 warns that neglecting the Passover brings being cut off – similar gravity to Paul's warning about unworthy participation.

Matthew 22:12 depicts a man cast out for lacking wedding garments – similar to Paul's warning about partaking unworthily in the feast.