Luke 22:7
Then came the day of Unleavened Bread on which the Passover lamb had to be sacrificed — the day of Passover preparation: the specific day within the festival sequence when the lambs are slaughtered. The Passover lamb that had to be sacrificed (edei thyesthai, it was necessary to sacrifice) communicates the theological necessity — what is about to happen with Jesus is set within the framework of what the Passover lamb anticipated.