Exodus 12:14 - Ellicott's Commentary On The Whole Bible

Ye shall keep it a feast... by an ordinance for ever. — The Passover is continued in the Eucharist (1 Corinthians 5:7-8); and the Easter celebration, which the Church makes binding on all her members, exactly corresponds in time to the Paschal ceremony, and takes its place. In this way the Passover may be regarded as still continuing under Christianity, and as intended to continue, “even to the end of the world.”