Leviticus 23:24-26 New Revised Standard Version, Anglicised Catholic Edition (NRSVACE)
24 Speak to the people of Israel, saying: In the seventh month, on the first day of the month, you shall observe a day of complete rest, a holy convocation commemorated with trumpet blasts. 25 You shall not work at your occupations; and you shall present the Lord’s offering by fire.
The Day of Atonement
26 The Lord spoke to Moses, saying: