Numbers 29:7-8

7“Ten days later, on the tenth day of the same month, you must call another holy assembly. On that day, the Day of Atonement, the people must go without food and must do no ordinary work.

8You must present a burnt offering as a pleasing aroma to the Lord. It will consist of one young bull, one ram, and seven one-year-old male lambs, all with no defects.