1 Corinthians 10:16-18 New Revised Standard Version (NRSV)
16 The cup of blessing that we bless, is it not a sharing in the blood of Christ? The bread that we break, is it not a sharing in the body of Christ? 17 Because there is one bread, we who are many are one body, for we all partake of the one bread. 18 Consider the people of Israel;[a] are not those who eat the sacrifices partners in the altar?