1 Corinthians 11:25-26

Similarly when supper was ended, He took the cup also, saying, This cup is the new covenant [ratified and established] in My blood. Do this, as often as you drink [it], to call Me [affectionately] to remembrance. For every time you eat this bread and drink this cup, you are representing and signifying and proclaiming the fact of the Lord's death until He comes [again].