Luke 22:1 and 2:
22:1But the feast of the unleavened, the (feast) being said (as) "Passover" used-to come-near; .2and the chief-priests and the scribes used-to seek-after how they may eliminate him for they used-to be fearful (of) the people.
Continuing from Luke chapter 21...
...Luke writes that during that past time the feast (the celebration of a certain festival) pertaining to the unleavened...
However, the chief/high priests and the scribes were seeking after how (looking for the manner in/by which) they would eliminate him (take Jesus up and slay him, put him out of their way by killing him) for they were continuing to be fearful of the people (they were afraid of the mass or group of people collectively as one unit, one united assembly; this word usually refers to the descendants of Israel/Jacob).
During the old covenant times God instructed the children (sons, descendants) of Israel/Jacob regarding the Passover and the Feast of Unleavened Bread (refer to Exodus chapter 12). Usually the people would bake their bread with a small piece of leaven in it, but from the killing and offering in sacrifice of the Passover lamb and during the whole time of the Feast of Unleavened Bread they were not allowed to put any leaven in the dough to make their bread. All of this was a type (pattern) to God's people at that time that the promised seed would redeem and save them from the sin and its consequences as promised by God initially in Genesis 3:15.
Therefore, after the one true and complete sacrifice was made (by the Messiah/Christ giving himself as the sacrifice receiving the right/just consequences of the sin and sins against the only true God), then God's people would no-longer need to offer any other sacrifice because nothing would need to be added-to or taken-away-from them in order to make them acceptable to God. They themselves would not at some future time be permanently killed and burned-up by God’s fire, as their physical sacrifices were when God accepted those physical sacrifices in their place so that they could stay alive.
The true and complete Passover sacrifice, which would be offered once by the Christ, would permanently redeem and save them by making them new – as a new loaf of bread having already been raised-up and therefore not in need of any leaven to raise them up. They would at a future time-period be raised-up by the Christ and given new spiritual bodies. Of course, it is only the people who believe what Jesus said and did who actually receive the blessing. References regarding this topic are: Exodus chapter 12 and I Corinthians 5:7.
The time of year that the Passover was sacrificed was on the 14th Nisan in the Judean calendar (some scholars indicate that this date corresponds to April 10th). This year of 28 A.D. Jesus was going to be the true sacrificial offering, the Passover Lamb of God.
[Reference: Matthew 26:1-5; Mark 14:1 and 2; John 1:29 and 36; I Corinthians 5:7; I Peter 1:19. Note: verbs with a superscript 2 (2) immediately following them indicate the "perfect" tense - details are provided in the "Relevant Notes" link of this study.]
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