1 Corinthians 10
16 Ref The cup of blessing which we bless, isn't it a communion of the blood of Christ? The bread which we break, isn't it a communion of the body of Christ?
17 Ref Because we, who are many, are one bread, one body; for we all partake of the one bread.
18 Ref Consider Israel after the flesh. Don't those who eat the sacrifices have communion with the altar?