Numbers 29:12-13

12And on the fifteenth day of the seventh month ye shall have a holy convocation; ye shall do no servile work, and ye shall keep a feast unto Jehovah seven days: 13and ye shall offer a burnt-offering, an offering made by fire, of a sweet savor unto Jehovah; thirteen young bullocks, two rams, fourteen he-lambs a year old; they shall be without blemish;