1 Corinthians 10:16-18

Mace(i) 16 the cup of benediction which we bless, is it not the communion of the blood of Christ? the bread which we break, is it not the communion of the body of Christ? 17 for the bread being one, as many as we are, we are one body: for we are all partakers of that one bread. 18 consider the custom of the Jews by descent, are not they which eat of the sacrifices, partakers of the altar? what say I then?