Jesus is the Passover Lamb that was slain. When Jesus said thee cup, he was saying I am the one you’ve been looking for. It is only the blood of Jesus who can take away my sin.
This Cup is the new Covenant and my blood which is poured out for you. Jesus’ death on the cross was the fulfillment. Our Passover Lamb. Jesus Boldly took Thee cup and made His proclamation loud and clear.