Luke 22:7 KJV

Then came the day of unleavened bread, when the passover must be killed.
Luke 22:7, King James Version

In context

6 And he promised, and sought opportunity to betray him unto them in the absence of the multitude.

7 Then came the day of unleavened bread, when the passover must be killed.

8 And he sent Peter and John, saying, Go and prepare us the passover, that we may eat.