1 Corinthians 5:7-8

Purge out therefore the old leaven, that ye may be a new mass, as ye are unleavened. For our passover hath been sacrificed for us, even Christ.

Treasury of Scripture Knowledge

Summary

And Hezekiah sent to all Israel and Judah, and wrote letters also to Ephraim and Manasseh, that they should come to the house of the LORD at Jerusalem, to keep the passover unto the LORD God of Israel.

Bible References

To keep

1 Corinthians 5:7
Purge out therefore the old leaven, that ye may be a new mass, as ye are unleavened. For our passover hath been sacrificed for us, even Christ.