Leviticus 25:9

9 Then have the trumpet sounded everywhere on the tenth day of the seventh month; on the Day of Atonement sound the trumpet throughout your land.

Read Leviticus 25:9 Using Other Translations

Then shalt thou cause the trumpet of the jubile to sound on the tenth day of the seventh month, in the day of atonement shall ye make the trumpet sound throughout all your land.
Then you shall sound the loud trumpet on the tenth day of the seventh month. On the Day of Atonement you shall sound the trumpet throughout all your land.
Then on the Day of Atonement in the fiftieth year, blow the ram’s horn loud and long throughout the land.