Part 2, Section 1, Chapter 2, Article 1, SubSection 2, Heading 1
1151 Signs taken up by Christ. In his preaching the Lord Jesus often makes use of the signs of creation to make known the mysteries of the Kingdom of God. 17 He performs healings and illustrates his preaching with physical signs or symbolic gestures. 18 He gives new meaning to the deeds and signs of the Old Covenant, above all to the Exodus and the Passover, 19 for he himself is the meaning of all these signs.
Part 2, Section 2, Chapter 1, Article 3, SubSection 3, Heading 2
1339 Jesus chose the time of Passover to fulfill what he had announced at Capernaum: giving his disciples his Body and his Blood:
Then came the day of Unleavened Bread, on which the passover lamb had to be sacrificed. So Jesus sent Peter and John, saying, "Go and prepare the passover meal for us, that we may eat it...." They went ... and prepared the passover. And when the hour came, he sat at table, and the apostles with him. And he said to them, "I have earnestly desired to eat this passover with you before I suffer; for I tell you I shall not eat it again until it is fulfilled in the kingdom of God.".... And he took bread, and when he had given thanks he broke it and gave it to them, saying, "This is my body which is given for you. Do this in remembrance of me." And likewise the cup after supper, saying, "This cup which is poured out for you is the New Covenant in my blood." 166