Charles Ellicott Commentary Luke 22:7

"And the day of unleavened bread came, on which the passover must be sacrificed." — Luke 22:7 (ASV)

Then came the day of unleavened bread.—See Notes on Matthew 26:17-19; Mark 14:12–16. St. Luke, like St. Mark, writing for Gentiles, adds the explanatory note, when the Passover must be killed, or, better, sacrificed. (Compare Christ our Passover was sacrificed for us, in 1 Corinthians 5:7.)