Church Fathers on Luke 22:1

The actions of the Jews were a shadow of our own. Accordingly if you ask of a Jew concerning the Passover, and the feast of unleavened bread, he will tell you nothing momentous, mentioning the deliverance from Egypt; whereas should a man inquire of me he would not hear of Egypt or Pharaoh, but of freedom from sin and the darkness of Satan, not by Moses, but by the Son of God;

Whose Passion the Evangelist being about to relate, introduces the figure of it, saying, Now the feast of unleavened bread drew nigh, which is called the Passover.

Now the Passover, which is called in Hebrew “Phase,” is not so named from the Passion, but from the passing over, because the destroying angel, seeing the blood on the doors of the Israelites, passed over them, and touched not their first-born. Or the Lord Himself, giving assistance to His people, walked over them. But herein is the difference between the Passover and the feast of unleavened bread, that by the Passover is meant that day alone on which the lamb was slain…