Exodus 12:16

12:16 On the first day there will be a holy convocation, and on the seventh day there will be a holy convocation for you. You must do no work of any kind on them, only what every person will eat – that alone may be prepared for you.

Leviticus 23:7-8

23:7 On the first day there will be a holy assembly for you; you must not do any regular work. 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.’”