Num Numbers, chapter Book of Numbers, chapter 29
And in the Chodesh Hashevi'i29:1 i.e., Tishri on the first day of the month, ye shall have a mikra kodesh; ye shall do no melekhet avodah; it is a Yom Teruah (Day of the sounding of the Shofar, i.e., Rosh Hashanah) unto you. Lev 23:24