Leviticus 23:23-27

23The Lord said to Moses,

24‘Tell Israel's people this. On the first day of the seventh month, they must rest. It is a special day. They must worship together with the sound of trumpets.

25They must not work. They must burn an offering to the Lord.’

26The Lord said to Moses,

27‘The tenth day of the seventh month is the Day of Atonement. On that day, the people must come together. They must not eat any food. They must make an offering of food to the Lord.