Leviticus 23:26-30

Then the Lord spoke to Moses, saying,

“On exactly the tenth day of this seventh month is the Day of Atonement; it shall be a holy convocation for you, and you shall humble yourselves and present an offering by fire to the Lord.

You shall not do any work on this very day, for it is a Day of Atonement, to make atonement on your behalf before the Lord your God.

If there is any person who does not humble himself on this very day, he shall be cut off from his people.

As for any person who does any work on this very day, that person I will eliminate from among his people.