1 Corinthians 10:16-18 Amplified Bible, Classic Edition (AMPC)
16 The cup of blessing [of wine at the Lord’s Supper] upon which we ask [God’s] blessing, does it not mean [that in drinking it] we participate in and share a fellowship (a communion) in the blood of Christ (the Messiah)? The bread which we break, does it not mean [that in eating it] we participate in and share a fellowship (a communion) in the body of Christ?
17 For we [no matter how] numerous we are, are one body, because we all partake of the one Bread [the One Whom the communion bread represents].
18 Consider those [physically] people of Israel. Are not those who eat the sacrifices partners of the altar [united in their worship of the same God]?
1 Corinthians 10:16-18 New International Version (NIV)
16 Is not the cup of thanksgiving for which we give thanks a participation in the blood of Christ? And is not the bread that we break a participation in the body of Christ? 17 Because there is one loaf, we, who are many, are one body, for we all share the one loaf.
18 Consider the people of Israel: Do not those who eat the sacrifices participate in the altar?