Leviticus 23:27

23:27 “The tenth day of this seventh month is the Day of Atonement. It is to be a holy assembly for you, and you must humble yourselves and present a gift to the Lord.

Leviticus 23:31-32

23:31 You must not do any work. This is a perpetual statute throughout your generations in all the places where you live. 23:32 It is a Sabbath of complete rest for you, and you must humble yourselves on the ninth day of the month in the evening, from evening until evening you must observe your Sabbath.”