Leviticus 23:8

23:8 You must present a gift to the Lord for seven days, and the seventh day is a holy assembly; you must not do any regular work.’”

Leviticus 23:12

23:12 On the day you wave the sheaf you must also offer a flawless yearling lamb for a burnt offering to the Lord,

Leviticus 23:36

23:36 For seven days you must present a gift to the Lord. On the eighth day there is to be a holy assembly for you, and you must present a gift to the Lord. It is a solemn assembly day; you must not do any regular work.