TSK · Leviticus 23:8

For seven days you must eat bread made without yeast, and on the seventh day there is to be a festival to the LORD.

And on the first day there is to be a holy assembly; you must do no ordinary work on it.

Firstfruits“‘Also, on the day of the first fruits, when you bring a new grain offering to the LORD during your Feast of Weeks, you are to have a holy assembly. You must do no ordinary work.