Leviticus 23:28-30

New Century Version

²⁸ Do not do any work on that day, because it is the Day of Cleansing. On that day the priests will go before the Lord and perform the acts to make you clean from sin so you will belong to the Lord.

²⁹ “Anyone who refuses to give up food on this day must be cut off from the people. ³⁰ If anyone works on this day, I will destroy that person from among the people.