Leviticus 23:28-32

28Do not do any work on that day, because it is the Day of Atonement, when atonement is made for you before the Lord your God.

29Those who do not deny themselves on that day must be cut off from their people.

30I will destroy from among their people anyone who does any work on that day.

31You shall do no work at all. This is to be a lasting ordinance for the generations to come, wherever you live.

32It is a day of sabbath rest for you, and you must deny yourselves. From the evening of the ninth day of the month until the following evening you are to observe your sabbath.”