Luke 22:17-20 (NASB)
17 And when He had taken a cup and given thanks, He said, “Take this and share it among yourselves; 18 for I say to you, I will not drink of the fruit of the vine from now on until the kingdom of God comes.” 19 And when He had taken some bread and given thanks, He broke it and gave it to them, saying, “This is My body, which is being given for you; do this in remembrance of Me.” 20 And in the same way He took the cup after they had eaten, saying, “This cup, which is poured out for you, is the new covenant in My blood.
1 Corinthians 10:16-17 (NASB)
16 Is the cup of blessing which we bless not a sharing in the blood of Christ? Is the bread which we break not a sharing in the body of Christ? 17 Since there is one loaf, we who are many are one body; for we all partake of the one loaf.