Exodus 12:16
16 On the first day you shall hold a xholy assembly, and on the seventh day a holy assembly. No work shall be done on those days. But what everyone needs to eat, that alone may be prepared by you.
Leviticus 23:36
36 For seven days you shall present food offerings to the Lord. qOn the eighth day you shall hold a holy convocation and present a food offering to the Lord. It is a rsolemn assembly; you shall not do any ordinary work.